1. Di Toro, D.M. and van Straten, G. (1979). Uncertainty in the Parameters and Predictions of Phytoplankton Models. WP-79-29. International Institute for Applied Systems Analysis, Laxenburg, Austria.
2. Fletcher, R. and Powell, M.J.D. (1963). A rapidly convergent descent method for minimization. Computer Journal, 6:163–168.
3. Greville, T.N.E. (1967). Spline functions, interpolation and numerical quadrature. In A. Ralston and H.S. Wilfs (Editors), Mathematical Methods for Digital Computers. Vol. II. Wiley, Chichester.
4. Jørgensen, S.E., Mejer, H., and Friis, M. (1978). Examination of a lake model. Ecological Modelling, 4:253–278.
5. Kamp-Nielsen, L. (1978). Modelling the vertical gradients in sedimentary phosphorus fractions. Verhandlungen des internationalen Vereins für Limnologie, 20:720–727.