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@article{DE_1973_9_10_a4, author = {I. P. Martynov}, title = {Differential equations with fixed critical singular points}, journal = {Differencialʹnye uravneni\^a}, pages = {1780--1791}, publisher = {mathdoc}, volume = {9}, number = {10}, year = {1973}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1973_9_10_a4/} }
I. P. Martynov. Differential equations with fixed critical singular points. Differencialʹnye uravneniâ, Tome 9 (1973) no. 10, pp. 1780-1791. http://geodesic.mathdoc.fr/item/DE_1973_9_10_a4/