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@article{DE_1973_9_8_a14, author = {L. N. Lyapin}, title = {Set-valued mappings in the theory of integral equations with a discontinuous operator}, journal = {Differencialʹnye uravneni\^a}, pages = {1511--1519}, publisher = {mathdoc}, volume = {9}, number = {8}, year = {1973}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1973_9_8_a14/} }
L. N. Lyapin. Set-valued mappings in the theory of integral equations with a discontinuous operator. Differencialʹnye uravneniâ, Tome 9 (1973) no. 8, pp. 1511-1519. http://geodesic.mathdoc.fr/item/DE_1973_9_8_a14/