@article{DAN_1987_296_2_a7,
     author = {F. R. Sadykov},
     title = {Stability of continuous systems with several nonstationary},
     journal = {Doklady Akademii Nauk},
     pages = {292--296},
     publisher = {mathdoc},
     volume = {296},
     number = {2},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1987_296_2_a7/}
}