@article{1250130134, author = {Schaar, Richard}, title = {Singular perturbed conservative systems}, journal = {Rocky Mountain J. Math.}, volume = {6}, number = {4}, year = {1976}, pages = { 711-724}, language = {en}, url = {http://dml.mathdoc.fr/item/1250130134} }
Schaar, Richard. Singular perturbed conservative systems. Rocky Mountain J. Math., Tome 6 (1976) no. 4, pp. 711-724. http://gdmltest.u-ga.fr/item/1250130134/