@article{DAN_1980_255_3_a0,
     author = {R. I. Kozlov and V. M. Matrosov},
     title = {Derivation of theorems on dynamic properties with vector-valued {Ljapunov} functions for differential equations with perturbations},
     journal = {Doklady Akademii Nauk},
     pages = {521--525},
     publisher = {mathdoc},
     volume = {255},
     number = {3},
     year = {1980},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1980_255_3_a0/}
}