@article{IVM_2000_10_a1,
     author = {A. Yu. Aleksandrov},
     title = {On stability with respect to the nonautonomous first approximation},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {13--20},
     year = {2000},
     number = {10},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_2000_10_a1/}
}