@article{00897646, title = {Periodic solutions of quasi-differential equations.}, journal = {Journal of Applied Mathematics and Stochastic Analysis}, volume = {9}, year = {1996}, pages = {11-20}, doi = {10.1155/S1048953396000020}, zbl = {0853.34019}, language = {en}, url = {http://dml.mathdoc.fr/item/00897646} }
Boucherif, Abdelkader; García-Río, Eduardo; Nieto, Juan J. Periodic solutions of quasi-differential equations.. Journal of Applied Mathematics and Stochastic Analysis, Tome 9 (1996) pp. 11-20. doi : 10.1155/S1048953396000020. http://gdmltest.u-ga.fr/item/00897646/