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@article{DE_1994_30_9_a8, author = {E. L. Perchik}, title = {On a remark of {E.} {Goursat} and its applications}, journal = {Differencialʹnye uravneni\^a}, pages = {1561--1565}, publisher = {mathdoc}, volume = {30}, number = {9}, year = {1994}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1994_30_9_a8/} }
E. L. Perchik. On a remark of E. Goursat and its applications. Differencialʹnye uravneniâ, Tome 30 (1994) no. 9, pp. 1561-1565. http://geodesic.mathdoc.fr/item/DE_1994_30_9_a8/