@article{DAN_1991_319_1_a12,
     author = {A. M. Samoilenko and M. Ilolov},
     title = {On the theory of time-inhomogeneous evolution equations with},
     journal = {Doklady Akademii Nauk},
     pages = {63--67},
     publisher = {mathdoc},
     volume = {319},
     number = {1},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1991_319_1_a12/}
}