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@article{DE_1981_17_5_a24, author = {M. Utepbergenov}, title = {On the theory of pseudoregular singularities of degenerate equations}, journal = {Differencialʹnye uravneni\^a}, pages = {941--943}, publisher = {mathdoc}, volume = {17}, number = {5}, year = {1981}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1981_17_5_a24/} }
M. Utepbergenov. On the theory of pseudoregular singularities of degenerate equations. Differencialʹnye uravneniâ, Tome 17 (1981) no. 5, pp. 941-943. http://geodesic.mathdoc.fr/item/DE_1981_17_5_a24/