@article{DAN_1989_308_2_a4,
     author = {M. I. Gil'},
     title = {Stability of essentially nonlinear time-dependent systems},
     journal = {Doklady Akademii Nauk},
     pages = {281--284},
     publisher = {mathdoc},
     volume = {308},
     number = {2},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1989_308_2_a4/}
}