Dm. Zhu, MELNIKOV VECTOR AND HETEROCLINIC MANIFOLDS, Science in China. Series A, Mathematics, Physics, Astronomy & Technological Sciences, 37(6), 1994, pp. 673-682
Using the exponential dichotomies, the transversality theory and the g
eneralized. Melnikov method, we consider the conditions for the persis
tence and the transversality of the singular orbit, with high degenera
cy, situated on the heteroclinic or homoclinic manifold under perturba
tion. The results obtained extend, include and improve the correspondi
ng ones given in certain papers well known in this area.