@article{IVM_1993_4_a9,
     author = {A. N. Savkin and V. A. Yakubovich},
     title = {Absolute stability of nonlinear systems with a~nonstationary linear part},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {101--105},
     publisher = {mathdoc},
     number = {4},
     year = {1993},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1993_4_a9/}
}