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@article{DE_1987_23_10_a5, author = {M. S. Nikol'skii}, title = {A piecewise constant integral for multivalued mappings}, journal = {Differencialʹnye uravneni\^a}, pages = {1705--1710}, publisher = {mathdoc}, volume = {23}, number = {10}, year = {1987}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1987_23_10_a5/} }
M. S. Nikol'skii. A piecewise constant integral for multivalued mappings. Differencialʹnye uravneniâ, Tome 23 (1987) no. 10, pp. 1705-1710. http://geodesic.mathdoc.fr/item/DE_1987_23_10_a5/