@article{GDZPPN002227789, title = {Remarks on dynamical systems with weak forces.}, journal = {Manuscripta mathematica}, volume = {55}, year = {1986}, pages = {417-424}, zbl = {0606.58039}, url = {http://dml.mathdoc.fr/item/GDZPPN002227789} }
Coti Zelati, Vittorio. Remarks on dynamical systems with weak forces.. Manuscripta mathematica, Tome 55 (1986) pp. 417-424. http://gdmltest.u-ga.fr/item/GDZPPN002227789/