Adnani, Fatiha El, and Hamad Talibi Alaoui. 2010. “Traveling Front Solutions in Nonlinear Diffusion Degenerate Fisher-KPP and Nagumo Equations via the Conley Index”. Topological Methods in Nonlinear Analysis 35 (1):43-60. https://apcz.umk.pl/TMNA/article/view/TMNA.2010.003.