@article{DAN_1984_276_4_a7,
     author = {A. I. Barkin and A. L. Zelentsovskii},
     title = {Absolute stability of automatic control systems with a single nonlinear element},
     journal = {Doklady Akademii Nauk},
     pages = {809--812},
     year = {1984},
     volume = {276},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1984_276_4_a7/}
}