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@article{DE_1976_12_3_a11, author = {L. I. Kovalenko}, title = {Existence of a generalized solution of the {Tricomi} {problem.~I}}, journal = {Differencialʹnye uravneni\^a}, pages = {511--528}, publisher = {mathdoc}, volume = {12}, number = {3}, year = {1976}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1976_12_3_a11/} }
L. I. Kovalenko. Existence of a generalized solution of the Tricomi problem.~I. Differencialʹnye uravneniâ, Tome 12 (1976) no. 3, pp. 511-528. http://geodesic.mathdoc.fr/item/DE_1976_12_3_a11/