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@article{MMO_1959_8_a5, author = {V. A. Chechik}, title = {Investigation of systems of ordinary differential equations with a singularity}, journal = {Trudy Moskovskogo matemati\v{c}eskogo ob\^{s}estva}, pages = {155--198}, publisher = {mathdoc}, volume = {8}, year = {1959}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MMO_1959_8_a5/} }
V. A. Chechik. Investigation of systems of ordinary differential equations with a singularity. Trudy Moskovskogo matematičeskogo obŝestva, Trudy Moskovskogo Matematicheskogo Obshchestva, Tome 8 (1959), pp. 155-198. http://geodesic.mathdoc.fr/item/MMO_1959_8_a5/