@article{DE_1976_12_3_a8,
     author = {H. Sh. Pham},
     title = {Controllability in multi-valued processes},
     journal = {Differencialʹnye uravneni\^a},
     pages = {484--493},
     publisher = {mathdoc},
     volume = {12},
     number = {3},
     year = {1976},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1976_12_3_a8/}
}