@article{1250126289,
author = {Hausrath, Alan R. and Manasevich, Raul F.},
title = {Periodic solutions of periodically forced non-degenerate systems},
journal = {Rocky Mountain J. Math.},
volume = {18},
number = {4},
year = {1988},
pages = { 49-66},
language = {en},
url = {http://dml.mathdoc.fr/item/1250126289}
}
Hausrath, Alan R.; Manasevich, Raul F. Periodic solutions of periodically forced non-degenerate systems. Rocky Mountain J. Math., Tome 18 (1988) no. 4, pp. 49-66. http://gdmltest.u-ga.fr/item/1250126289/