1. Effects of toxicant on chemostat models;Fergola,1994
2. A qualitative analysis of an additive chemostat model of microorganisms competing for two complementary nutrients;Fergola;Ricerche di Matematica,1992
3. A qualitative analysis of an additive chemostat model of microorganisms competing for two complementary nutrients with delayed recycling;Fergola,1993
4. Multiple nutrient limitations in ecological models;O'Neill;Ecological Modelling,1989
5. Stability theory by Lyapunov's second method;Yoshizawa,1966