An Application of the Generalized Morse Index to Travelling Wave Solutions of a Competitive Reaction-Diffusion Model C. ConleyR. Gardner Indiana University Mathematics Journal 1984 text pdf 10.1512/iumj.1984.33.33018 10.1512/iumj.1984.33.33018 en Indiana Univ. Math. J. 33 (1984) 319 - 343 state-of-the-art mathematics http://iumj.org/access/