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@article{DE_1967_3_10_a17, author = {B. P. Tkach}, title = {A partial differential equation with retarded argument}, journal = {Differencialʹnye uravneni\^a}, pages = {1796--1800}, publisher = {mathdoc}, volume = {3}, number = {10}, year = {1967}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1967_3_10_a17/} }
B. P. Tkach. A partial differential equation with retarded argument. Differencialʹnye uravneniâ, Tome 3 (1967) no. 10, pp. 1796-1800. http://geodesic.mathdoc.fr/item/DE_1967_3_10_a17/