A Semilinear Reaction-Diffusion Prey-Predator System with Nonlinear Coupled Boundary Conditions: Equilibrium and Stability Anthony Leung Indiana University Mathematics Journal 1982 text pdf 10.1512/iumj.1982.31.31020 10.1512/iumj.1982.31.31020 en Indiana Univ. Math. J. 31 (1982) 223 - 241 state-of-the-art mathematics http://iumj.org/access/