Halfon, E., 1975. The systems identification problem and the development of ecosystem models. Simulation, 38:149-152.

Halfon, E., 1976. Relative stability of ecosystem linear models. Ecological Modelling, 2:279-286.

Halfon, E., 1977. Analytical solution of the system sensitivity equation associated with a linear model. Ecological Modelling, 3:301-307.

Bargmann, R.E. and Halfon, E. 1977. Efficient algorithms for statistical estimation in compartmental analysis: modelling ⁶⁰Co kinetics in an aquatic microcosm. Ecological Modelling, 3:211-226.

Halfon, E. and Lam, D.C.L., 1978. The effects of advection-diffusion processes on the eutrophication of large lakes, a hypothetical example: Lake Superior. Ecological Modelling, 4:119-131.

Lam, D.C.L. and Halfon, E. 1978. Model of primary production including circulation influences in Lake Superior. Applied Mathematical Modelling, 2:30-40.

Halfon, E. and Reggiani, M.G., 1978. Adequacy of ecological models. Ecological Modelling, 4:41-50.

Halfon, E., Unbeahuen, H. and Schmid, C., 1979. Model order estimation and system identification theory and application to the modelling of ³²P kinetics within the trophogenic zone of a small lake. Ecological Modelling. 6:1-22.

Reggiani, M.G. and Halfon, E. 1979. Comments to "Adequacy of Ecosystem Models". ISEM Journal, 1:68.

Halfon, E., 1980. The current status and future of systems ecology: a personal view. INTECOL Bulletin, 7/8:30-32.

Tamura, H. and Halfon, E. 1980. Identification of a dynamic lake model by GMDH: an application to Lake Ontario. Ecological Modelling, 11:81-100.

Halfon, E. and Maguire, R.J. 1981. Distribution et transformation du Fenitrothion Spandu sur un etang: modelisation dans des conditions d'incertitude. Eau du Quebec, 14: 216-220.

Schom, C.B. and Halfon, E. 1982. Kin selection as a salmonid survival strategy explaining mortality and variable growth in families: a modeling study. J. Theor. Biol., 94: 153-172.

Beghelli, S., Guidorzi, R., Halfon, E. and F. Terragni, 1982. Identification of phosphorus dynamics in Kootenay Lake, Canada. Ecological Modelling 17:11-32.

Halfon, E., 1983. Is there a best model structure? I Modelling the fate of a toxic substance in a lake. Ecological Modelling, 20:135-152.

Halfon, E., 1983. Is there a best model structure? II Comparing model structures of different fate models. Ecological Modelling, 20:153-163.

Halfon, E., 1984. Error analysis and simulation of Mirex behaviour in Lake Ontario. Ecological Modelling, 22: 213 - 252.

Halfon, E. 1984. The composition of particulate matter in the euphotic zone of Lake Superior. J. Great Lakes Research, 10: 299-306.

Halfon, E. 1984. Is there a best model structure? III Testing the goodness of fit. Ecological Modelling, 27: 15-23.

Halfon, E., 1985. The regression method in ecotoxicology: A better formulation using the geometric mean functional regression. Environmental Science and Tech., 19: 747-749.

Halfon, E., 1985. The bootstrap and the jackknife in ecotoxicology or nonparametric estimates of standard error. Chemosphere, 14: 1433-1440.

Halfon, E., 1986. Modelling the fate of Mirex and Lindane off the Niagara River mouth. Ecological Modelling, 33: 13-33.

Halfon, E. and Reggiani, M.G., 1986. On ranking chemicals for environmental hazard. Environ. Science Tech., 20: 1173-1179.

Halfon, E., 1986. Modelling the pathways in the St. Clair-Detroit River system using the TOXFATE model: The fate of Perchloroethylene. Water Pollution Journal of Canada, 21: 411-421.

Halfon, E., 1987. Modelling of Mirex loadings to the bottom sediments of Lake Ontario within the Niagara River plume. J. Great Lakes Res., 13: 18-23.

Halfon, E. 1989. Comparison of an index function and a vectorial approach method for ranking waste disposal sites. Environ. Science Technol., 23: 600-609.

Halfon, E. 1989. Microcomputers in ecological modelling: a special issue dedicated to research, education and computer graphics. Ecol. Model., 47:3-6.

Halfon, E. 1989. The application of ecological modelling to toxic contaminants and ecosystem stress. Water Poll. Res. J. Canada, 24:323-343.

Halfon, E. and R. Brüggemann. 1989. Environmental hazard ranking of chemicals spilled in the Rhine River in November 1986. Acta hydrochim. hydrobiol., 17: 47-60.

Halfon, E. and R. Brüggemann. 1989. Environmental hazard of eight chemicals in the Rhine River. Wat. Sci. Tech., 21: 815-820.

Halfon, E. and D. de Jong. 1989. A computer program to display animations within the computer graphics HALO environment. Ecol. Model., 47:153-160.

Halfon, E., J-A. Hodson and K. Miles. 1989. An algorithm to plot Hasse diagrams on microcomputer and Calcomp plotters, Ecol. Model., 47:189-197.

Brüggemann, R. and Halfon, E. 1990. Ranking for environmental hazard of the chemicals spilled in the Sandoz accident in November 1986. Sci. Tot. Environ. 97:827-837

Halfon, E. and Brüggemann, R. 1990. Simulation of disulfoton fate in the River Rhine with the TOXFATE model, Sci. Tot. Environ., 97: 385-394.

Halfon, E., T.J. Simons and W.M. Schertzer. 1990. Modelling the spatial distribution of seven halocarbons in Lake St. Clair in June 1984 using the TOXFATE model. J. Great Lakes. Res., 16:90-112.

Halfon, E., B. Altschuh and Brüggemann, R. 1991. Estimations of aqueous solubility for octanol/water partition coefficient analyzed by the bootstrap method. Chemosphere, 22:953-957.

Beck, M.B. and Halfon, E. 1991. Uncertainty, identifiability and the propagation of prediction errors: a case study of Lake Ontario. J. Forecasting, 10: 135-161.

Halfon, E. and Poulton, D. 1992. Distribution of Chlorobenzenes, Pesticides and PCB Congeners in Lake Ontario near the Toronto Waterfront. Water Poll. Res. J. Canada, 27: 751-772.

Millard, E.S., Halfon, E., Minns. C.K., and Charlton, C.C. 1993. Effect of primary productivity and vertical mixing on PCB dynamics in planktonic model ecosystems. Environ. Toxicol. Chemistry, 12: 931-946.

Brüggemann, R. Munzer, B. and Halfon, E. 1994. An algebraic/graphical tool to compare ecosystems with respect to their pollution. The German River "Elbe" as an example. I: Hasse diagrams, Chemosphere, 28:863-872.

Münzer,B.; Brüggemann,R., Halfon,E., 1994. An algebraic/graphical tool to compare ecosystems with respect to their pollution: II: Comparative regional analysis, Chemosphere 28: 873-879

Halfon, E. and Howell, M. 1995. Visualization of limnological data as two- and-three-dimensional computer generated animations. J. Biol. Systems. 4:3-25.

Tartari, G., Binelli, A., Halfon, E., Howell, M., and Brendon, D. 1995 Animazione computerizzata pluriennale (1989-1991) di variabili limnologiche nel Lago d'Orta. Acqua e Aria, Aprile 1995, No. 4:409-420.

Halfon, E. and Allan, R.J. 1995. Modelling the fate of PCBs and Mirex in aquatic ecosystems using the TOXFATE model. Environment International, 21: 557-569.

Halfon E., N. Schito and R. E. Ulanowicz. 1996. Energy flow through the Lake Ontario food web: Conceptual model and an attempt to mass balance, Ecological Modelling, 86:1-36.

Halfon, E. 1996. Volume visualization of temperature concentrations in Hamilton Harbour, Lake Ontario. J. Great Lakes Res., 22:15-25.

Halfon, E. 1996. Data Animator, software that visualizes data as computer generated animations on personal computers: an application to Hamilton Harbour. Water Poll. Res. J. Canada, 31: 609-622.

Halfon, E., Galassi, S., Brüggemann, R., and Provini, A. 1996. Selection of priority properties to assess environmental hazard of pesticides. Chemosphere 33:1543-1562

Galassi, S., A. Provini, E. Halfon, 1996. Risk Assessment for Pesticides and Their Metabolites in Water. Intern J Environ Anal Chem, 65, 331-344.

Brüggemann, R. and Halfon, E. 1997. Comparative Analysis of Nearshore Contaminated Sites in Lake Ontario: Ranking for Environmental Hazard, J. Environ. Sci. Health, 32: 277-292

Halfon,E., Brüggemann, 2001. Evaluation of test battery results for the toxicity of chemicals in sediments of Lake Ontario. J. Chemical Information and Computer Science. 41: 918-925.

Halfon, E. 2001.Impact on the Fate of Toxic Contaminants in the Toronto Waterfront - Should the Toronto Main Sewage Treatment Plant Outfall Be Moved Farther Offshore? Water Quality Research Journal of Canada, 36: 21-42.

Halfon, E., 1979. Preview, theory in ecosystem modelling. In E. Halfon, E. (Ed.) Theoretical Systems Ecology, Academic Press, New York and London, pp 1-15.

Halfon, E., 1979. Mathematical modelling of phosphorus dynamics through integration of experimental work and system theory. In D. Scavia and A. Robertson (Eds.) Perspectives in Aquatic Ecosystem Modelling. Ann Arbor Science Publishers, Ann Arbor, pp 75-83.

Halfon, E., 1979. The effects of data variability in the development and validation of ecosystem models. In: B.G. Zeigler, M.S. Elzas, G.J. Klir and T.I. Oren, (Eds.) Methodology in Systems Modelling and Simulation, North Holland Publishing Company, pp. 335-343.

Halfon, E., 1979. Computer-based development of large scale ecological models: problems and prospects. In: G.S. Innis and R.V.O'Neill (Eds.) Systems Analysis of Ecosystems, International Co-operative Publishing House, Burtonsville, Maryland, PP- 197-209.

Halfon, E., 1979. On the parameter structure of a large-scale ecological model. In: G.P. Patil and M. Rosenzweig (Eds.) Contemporary Quantitative Ecology and Related Econometrics, International Co-operative Publishing House, pp. 274-293.

Halfon, E. 1980. Assessment of uncertainty in long term prediction made through mathematical models. In Y. Haimes and J. Kindler (Eds.) Water and Related Land Resource Systems, Pergamon Press, Oxford and New York, 205 - 209.

Halfon, E. and Maguire, R.J. 1983. Distribution and transformation of Fenitrothion sprayed on a pond: Modelling under uncertainty. In M.B. Beck and G. van Straten (Eds.) Uncertainty and Forecasting of Water Quality. Springer-Verlag, Berlin and New York, 117-128.

Halfon, E., 1984. Predicting the environmental fate of toxic contaminants in large lakes: Data requirements for mathematical models. In K.L.E. Kaiser (Ed.) QSAR in Environmental Toxicology. D. Reidel Publishing Co., Dordrecht, Boston, Lancaster, 137-151.

Halfon, E., 1987. Hierarchical modelling in ecology. In. M.G. Singh and 23 other editors Systems and Control Encyclopaedia, Pergamon Press, London, p. 1329.

Halfon, E., 1987. Mathematical models in ecology. In M.G. Singh and 23 other editors Systems and Control Encyclopaedia, Pergamon Press, London, 1323-1324.

Halfon, E., 1987. Temperature model formulation in ecological modelling. In. M.G. Singh and 23 other editors Systems and Control Encyclopaedia, Pergamon Press, London, p. 1333.

Halfon, E. 1989. Modelling the fate of toxic contaminants in the aquatic environment: A review. In Aquatic Toxicology, E. Boudou and F. Ribeyre, Eds. CRC Press, 258-274.

Reggiani, M.G. and Halfon, E. 1988. An improved ranking scheme for environmental hazard. In A. Marani (Ed.) Advances in Environmental Modelling, Elsevier, Amsterdam, pp. 183-194.

Halfon, E. and Oliver, B.G. 1990. Simulation and data analysis of four chlorobenzenes in a large lake system (Lake Ontario) with TOXFATE, a contaminant fate model. In: S.E. Jorgensen (Ed.) Modelling in Ecotoxicology, Elsevier, pp. 197-214.

Halfon, E. and Schito, N. 1993. In search of a realistic Lake Ontario food web. In V. Christensen and D. Pauly (Eds.) Trophic models of aquatic ecosystems. Publishers: ICLARM Conference Proceedings No. 26. International Center for Living Aquatic Resources management, Manila, Philippines; International Council for the Exploration of the Sea, Copenhagen, Denmark; and, Danish International Development Agency, Copenhagen, Denmark, 29-39.

Halfon, E. and N. Schito. 1993. Organic contaminants in Lake Ontario, 1968-1991. A Review and a data base. In Reducing uncertainty in mass balance models of toxics in the Great Lakes - Lake Ontario Case Study, Donald W. Rennie Memorial Monograph Series, No. 4, pp. 235-285.

Halfon, E. 1993. Ecological Modelling. In P.C. Young (Ed.), Concise Encyclopaedia of Environmental Systems, Pergamon Press., pp. 174.

Halfon, E. 1993. Lotka -Volterra Population Models. In P.C. Young (Ed.), Concise Encyclopaedia of Environmental Systems, Pergamon Press., pp. 354.

Halfon, E. and R. Guidorzi. 1993. Model Order Estimation. In P.C. Young (Ed.), Concise Encyclopaedia of Environmental Systems, Pergamon Press., pp. 375-380.

Halfon, E., Tartari, G., Howell, M., and Binelli, A. 1994. Visualization of pH changes due to liming treatments in Lake Orta, Italy, using computer generated animations. In G. Guariso and B. Page (Eds.) Computer Support for Environmental Assessment, Elsevier Science, 37-48.

Halfon, E., 1995. A systems approach to the determination of optimal experimental conditions to validate toxic contaminants volatilization models. In B.C. Patten and S.E.Jorgensen, Eds. Complex ecology: the part-whole relation in ecosystems, Prentice Hall, 297-303.

Halfon, E., 2006. Hasse diagrams and software development. In R. Brüggemann and L. Carlsen, Eds. Partial Order in Environmental Sciences and Chemistry,Springer, 385-392.

Halfon, E., 1974. Systems identification: a theoretical method applied to tracer kinetics in aquatic microcosms. Proceedings of the First International Congress of Ecology, The Hague, The Netherlands, September 8-14, 1974, pp 262-265.

Halfon, E., 1975. A system identification algorithm developed for ecological models. Proceedings of the 7th Annual Southeastern Symposium of System Theory (IEEE), Auburn - Tuskegee, Alabama, March 20-21, 1975, pp. 15-17.

Halfon, E. and Bargmann, R.E., 1976. System identification of radioisotope flows in aquatic microcosms. Proceedings of the Fourth National Symposium on Radioecology, Corvallis, Oregon, May 12-14, 1975. pp 184-193.

Halfon, E. and Reggiani, M.G., 1977. The aggregation problem in ecology. Proceedings of the 24th International Scientific Congress on Electronics, Rome, Italy, March 28-30, 1977, pp. 179-183.

Halfon, E., 1978. Identification and ecological modelling. Proceedings of the Fourth IFAC Symposium on Identification and System Parameter Estimation. September 21-27, 1976, Tbilisi, Georgian SSR, URSS, North Holland Publishing Co., Amsterdam and New York, pp. 727-737.

Halfon, E., 1978. Theory in model development. In Unifying principles in Ecology. Proceedings of the Second International Congress of Ecology, Jerusalem, Israel, August 25-29, 1978, pp. 98-102.

Halfon, E., 1982. Uncertainty in modeling the environmental fate of Mirex in Lake Ontario. In. L. Troncale (Ed.) A General survey of systems methodology. Proceedings of the 26th annual meeting of the Society for General Systems Research, Washington, DC, January 5-9, 1982. 553-558.

Halfon, E., 1983. Uncertainty analysis in ecological modelling. In Analysis of Ecological systems: State of the Art in Ecological Modelling, Fort Collins, Colorado, May 24-29, 1982. Elsevier, Amsterdam, 655-662.

Halfon, E., Tartari, G., Brendon, D., and Binelli, A. 1993. Visualization and limnological interpretation of liming treatments in a deep lake, Lake Orta, Italy, using computer generated animations. In IFIP, WG 5.11 Working conference on Computer Support for Environmental Assessment, CSEIA '93, villa Olmo, Como, Oct. 6-8, 1993. pp. 82-91.

Mackay, D., Halfon, E., and Di Guardo, A. 1995. Problems and perspectives of regional fate modelling of xenobiotics: A Strategy for Enhancing the Role of Multimedia Mass Balance Models for the Stewardship of Chemicals, Proceedings of a Workshop held at Hillerrød, Denmark, Jan. 30-Feb. 1, 1995, sponsored by the European Science Foundation

Brüggemann, R., Voigt, K and Halfon, E. 1996. Partially ordered sets - A computerized tool to compare environmental databases. In Environmental Software Systems, R. Denzer, G. Schimak and D. Russell (Eds.) Proceedings of the International Symposium on Environmental Software Systems, 1995, Chapman & Hall, pp. 185-195.

Halfon, E. 1995. Data Animator: Visualization of two- and three dimensional data as computer generated animations. In Environmental Software Systems, R. Denzer, G. Schimak and D. Russell (Eds.) Proceedings of the International Symposium on Environmental Software Systems, 1995, Chapman & Hall, pp. 263-271.

Halfon, E. Volume visualization of water quality data in Hamilton Harbour, Lake Ontario. In Environmental Software Systems, R. Denzer, G. Schimak and D. Russell (Eds.) Proceedings of the International Symposium on Environmental Software Systems, 1995, Chapman & Hall, pp. 278-286.

Halfon, E. and Brüggemann, R. 1998. On ranking chemicals for environmental hazard. Comparison of methodologies. Proceedings of the workshop on Order Theoretical Tools in Environmental Sciences, Berlin, pp. 11-48.

Brüggemann,R., Halfon,E., 2000. Introduction into the basic principles of ranking theory by partial order. Proceedings of the Second workshop on the use of Hasse diagrams, Roskilde, Denmark, October 1999.

Brüggemann, R., Halfon, E., Pudenz, R., Simon, G. and Luther, M. 2000. New tools for the analysis of Hasse diagrams for ranking chemicals. Proceedings of the Second workshop on the use of Hasse diagrams, Roskilde, Denmark, October 1999.

Beck, M.B., Halfon, E. and G. van Straten, 1979. The propagation of errors and uncertainty in forecasting water quality. Part I: method. International Institute of Applied Systems Analysis WP-79-100, Laxenburg, Austria, 54 pp.

Beghelli, S., Guidorzi, R. Halfon, E., Losito, P., Muratori, T., and Terragni, F., 1979. Eutrofizzazione in acque dolci e dinamica del fosforo (Eutrophication in freshwaters and phosphorus dynamics), Analisi e Gestione dei Sistemi Ambientali, GRAGSA, CLUP, Milano, pp 1-12.

Simons, T.J., Boyce, F.M., Fraser, A.S., Halfon, E. Hyde, D., Lam, D.C.L., Schertzer, W.M., El-Shaarawi, A.H., Willson, K., and Warry, D., 1979. Assessment of water quality simulation capability for Lake Ontario. Scientific Series No. 111, Inland Waters Directorate, Environment Canada, 220 pp.

Halfon, E. 1983. Organic contaminants fate model for the prediction of transient water quality in the Niagara River plume, Lake Ontario. NWRI, Report #83-3, Environment Canada, 82 pp.

Halfon, E., 1984. Modelling the fate of toxic contaminants in the Niagara River and Lake Ontario. NWRI, Report #84-39, Environment Canada, 103 pp.

Halfon, E., 1986. The bootstrap and quantitative structure activity relation multiple linear regression models for nonparametric estimates of standard error. NWRI report

Halfon, E., 1987. The feasibility of modelling the fate of organics and heavy metals in the Yamaska River watershed before and after the construction of car assembly plant near Bromont, Quebec.

Brüggemann, R. and Halfon, E. 1989. A ranking analysis of contaminated sites along the shores of Lake Ontario. NWRI Report No. 89-22.

Halfon, E. 1991. Fate of toxic contaminants in lakes: development and calibration of TOXFATE (Version 3.6). NWRI Report.

Brüggemann, R. and Halfon E. 1991. Analysis of Hasse diagrams. NWRI Report.

Brüggemann, R. and Halfon, E. 1989. A ranking analysis of contaminated sites along the shores of lake Ontario. NWRI Report No. 89-22.

Halfon, E. 1991. Fate of toxic contaminants in lakes: development and calibration of TOXFATE (Version 3.6). NWRI Report.

Brüggemann, R. and Halfon E. 1991. Analysis of Hasse diagrams. NWRI Report.

Halfon, E. 1994. Visualization of temperature and oxygen concentrations in Hamilton Harbour, Lake Ontario, NWRI Contribution No. 94-79.

Halfon, E. and Howell, M. 1994. Data Animator Manual. NWRI Internal Report.

Brüggemann, R. and Halfon, E. 1994. Sensitivity analysis of partially ordered sets and ranking objects of environmental interest. NWRI Contribution No. 94-95.

Brüggemann, R. and Halfon, E. 1995. Theoretical base of the program "Hasse". GSF, Technical report, Bericht 20/95. 67 pp.

Halfon, E., 1971. Costo energetico del nuoto subacqueo (Energetic cost of SCUBA diving). Laurea minor thesis. Institute of Human Physiology, University of Milano, Italy, 26 pp.

Halfon, E., 1971. Analisi dei popolamenti e misura della produttivita' primaria in un lago artificiale eutrophico (Analysis of populations and measure of primary production in an eutrophic reservoir), Laurea Thesis, University of Milano, Italy, 153 pp.

Halfon, E., 1975. A systems identification procedure for large-scale ecosystem models. Ph.D. Dissertation, Department of Zoology and Institute of Ecology, University of Georgia, Athens, 212 pp.