@article{DE_1974_10_8_a23,
     author = {R. I. Putilova},
     title = {A qualitative study of a certain system of three differential equations by means of integral surfaces},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1533--1536},
     publisher = {mathdoc},
     volume = {10},
     number = {8},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1974_10_8_a23/}
}