@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/}
}