@article{articlec662aa06,
title   = {Zip bifurcation in a competitive system with diffusion},
author = {Ferreira, Jocirei Dias and Oliveira, Luiz Augusto Fernandes de},
year = {2009},
doi = {10.1007/s12591-009-0003-0},
journal   = {Differential Equations and Dynamical Systems}
}