Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DE_1967_3_8_a0, author = {S. T. Zavalishchin}, title = {Periodic generalized orbits}, journal = {Differencialʹnye uravneni\^a}, pages = {1231--1239}, publisher = {mathdoc}, volume = {3}, number = {8}, year = {1967}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1967_3_8_a0/} }
S. T. Zavalishchin. Periodic generalized orbits. Differencialʹnye uravneniâ, Tome 3 (1967) no. 8, pp. 1231-1239. http://geodesic.mathdoc.fr/item/DE_1967_3_8_a0/