@article{DAN_1989_308_6_a8,
     author = {K. A. Abgaryan},
     title = {On the problem of the stability of linear time-dependent systems},
     journal = {Doklady Akademii Nauk},
     pages = {1320--1321},
     publisher = {mathdoc},
     volume = {308},
     number = {6},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1989_308_6_a8/}
}