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These publications show my interest in the development of ecological models based on a system theoretical approach. The dates of these publications range between 1974 and 1995.

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

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

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

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., 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.

Halfon, E. (Ed.) Theoretical Systems Ecology, Academic Press, New York and London.

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.

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.

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.

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

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

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.

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., 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.

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