On a predator-prey system with cross-diffusion representing the tendency of prey to keep away from its predators. - Wonlyul Ko; Kimun Ryu (Appl. Math. Lett., 2008)

Coexistence of a one-prey two-predators model with ratio-dependent functional responses. - Seunghyeon Baek; Wonlyul Ko; Inkyung Ahn (Appl. Math. Comput., 2012)