Geodesic
The class of systems of differential equations which have no solutions with mobile essentially singular points
Differencialʹnye uravneniâ, Tome 5 (1969) no. 2, pp. 263-272 
S. G. Kondratenya. The class of systems of differential equations which have no solutions with mobile essentially singular points. Differencialʹnye uravneniâ, Tome 5 (1969) no. 2, pp. 263-272. http://geodesic.mathdoc.fr/item/DE_1969_5_2_a4/
@article{DE_1969_5_2_a4,
     author = {S. G. Kondratenya},
     title = {The class of systems of differential equations which have no solutions with mobile essentially singular points},
     journal = {Differencialʹnye uravneni\^a},
     pages = {263--272},
     year = {1969},
     volume = {5},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1969_5_2_a4/}
}
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