@article{1183555135,
author = {Mawhin, Jean},
title = {Review: Krzysztof P. Rybakowski, The homotopy index and partial differential equations},
journal = {Bull. Amer. Math. Soc. (N.S.)},
volume = {21},
number = {1},
year = {1989},
pages = { 118-121},
language = {en},
url = {http://dml.mathdoc.fr/item/1183555135}
}
Mawhin, Jean. Review: Krzysztof P. Rybakowski, The homotopy index and partial differential equations. Bull. Amer. Math. Soc. (N.S.), Tome 21 (1989) no. 1, pp. 118-121. http://gdmltest.u-ga.fr/item/1183555135/