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@article{DE_1972_8_11_a0, author = {B. P. Bogoslovskii}, title = {The nonstationary singularities of a certain class of nonlinear equations}, journal = {Differencialʹnye uravneni\^a}, pages = {1919--1926}, publisher = {mathdoc}, volume = {8}, number = {11}, year = {1972}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1972_8_11_a0/} }
B. P. Bogoslovskii. The nonstationary singularities of a certain class of nonlinear equations. Differencialʹnye uravneniâ, Tome 8 (1972) no. 11, pp. 1919-1926. http://geodesic.mathdoc.fr/item/DE_1972_8_11_a0/