Some problems in the qualitative study of differential equations in the plane
Izvestiâ vysših učebnyh zavedenij. Matematika, no. 6 (1961), pp. 82-88
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@article{IVM_1961_6_a9,
author = {N. V. Medvedev},
title = {Some problems in the qualitative study of differential equations in the plane},
journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
pages = {82--88},
year = {1961},
number = {6},
language = {ru},
url = {http://geodesic.mathdoc.fr/item/IVM_1961_6_a9/}
}
N. V. Medvedev. Some problems in the qualitative study of differential equations in the plane. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 6 (1961), pp. 82-88. http://geodesic.mathdoc.fr/item/IVM_1961_6_a9/