Zhou, Jun. “Coexistence States of Diffusive Predator-Prey Systems With Preys Competition and Predator Saturation”. Topological Methods in Nonlinear Analysis 45, no. 2 (June 1, 2015): 509–550. Accessed April 24, 2024. https://apcz.umk.pl/TMNA/article/view/TMNA.2015.025.