@article{GDZPPN002207915,
title = {A topological invariant arising in the stability analysis of travelling waves.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {405},
year = {1990},
pages = {167-212},
zbl = {0705.35070},
url = {http://dml.mathdoc.fr/item/GDZPPN002207915}
}
Alexander, J.; Gardner, R.; Jones, C. A topological invariant arising in the stability analysis of travelling waves.. Journal für die reine und angewandte Mathematik, Tome 405 (1990) pp. 167-212. http://gdmltest.u-ga.fr/item/GDZPPN002207915/