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@article{DE_1967_3_1_a13, author = {S. V. Uspenskii}, title = {Mixed derivatives of functions summable with a weight}, journal = {Differencialʹnye uravneni\^a}, pages = {139--154}, publisher = {mathdoc}, volume = {3}, number = {1}, year = {1967}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1967_3_1_a13/} }
S. V. Uspenskii. Mixed derivatives of functions summable with a weight. Differencialʹnye uravneniâ, Tome 3 (1967) no. 1, pp. 139-154. http://geodesic.mathdoc.fr/item/DE_1967_3_1_a13/