@article{DAN_1983_271_2_a12,
     author = {V. A. Yakubovich},
     title = {Graphical criteria for absolute stability and absolute instability of nonlinear control systems},
     journal = {Doklady Akademii Nauk},
     pages = {307--310},
     publisher = {mathdoc},
     volume = {271},
     number = {2},
     year = {1983},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1983_271_2_a12/}
}