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@article{DE_1976_12_8_a0, author = {O. Boruvka}, title = {Theory of the global properties of second order linear ordinary differential equations}, journal = {Differencialʹnye uravneni\^a}, pages = {1347--1383}, publisher = {mathdoc}, volume = {12}, number = {8}, year = {1976}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1976_12_8_a0/} }
O. Boruvka. Theory of the global properties of second order linear ordinary differential equations. Differencialʹnye uravneniâ, Tome 12 (1976) no. 8, pp. 1347-1383. http://geodesic.mathdoc.fr/item/DE_1976_12_8_a0/