@article{DE_1977_13_9_a6,
     author = {V. K. Polivenko and M. P. Grigor'ev and I. G. Egorov},
     title = {The global stability of the zero solution of a system of two differential equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1606--1614},
     publisher = {mathdoc},
     volume = {13},
     number = {9},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1977_13_9_a6/}
}