@article{DE_1983_19_8_a11,
     author = {Sh. R. Sharipov and A. M. Matvienko},
     title = {Global phase portrait of a two-dimensional system of a special type},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1385--1389},
     publisher = {mathdoc},
     volume = {19},
     number = {8},
     year = {1983},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1983_19_8_a11/}
}