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@article{DE_1993_29_4_a20, author = {V. L. Khatskevich}, title = {Periodic solutions of differential inclusions with monotonous operators}, journal = {Differencialʹnye uravneni\^a}, pages = {725--727}, publisher = {mathdoc}, volume = {29}, number = {4}, year = {1993}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1993_29_4_a20/} }
V. L. Khatskevich. Periodic solutions of differential inclusions with monotonous operators. Differencialʹnye uravneniâ, Tome 29 (1993) no. 4, pp. 725-727. http://geodesic.mathdoc.fr/item/DE_1993_29_4_a20/