@article{DE_1975_11_4_a4,
     author = {R. G. Grabovskaya},
     title = {The asymptotic behavior of the solution of a system of two first order nonlinear differential equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {639--644},
     publisher = {mathdoc},
     volume = {11},
     number = {4},
     year = {1975},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1975_11_4_a4/}
}