%0 Report %9 IIASA Working Paper %A Gragnani, A. %C IIASA, Laxenburg, Austria %D 1994 %F iiasa:4146 %T Bifurcation Analysis of Two Predator-Prey Models %U https://pure.iiasa.ac.at/id/eprint/4146/ %X Bifurcation analysis is used to systematically detect unrealistic dynamic behaviors of two predator-prey models that have recently received support and attention. Comparisons with other existing models are also made, in order to show that the singularities of the two examined models are due to some biological weakness of their functional forms.