@article{DE_1977_13_8_a2,
     author = {P. S. Gromova and A. F. Pelevina},
     title = {Absolute stability of automatic control systems with lag},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1375--1383},
     publisher = {mathdoc},
     volume = {13},
     number = {8},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1977_13_8_a2/}
}