@article{ZVMMF_2009_49_12_a4,
     author = {E. V. Krutenko and V. B. Levenshtam},
     title = {Asymptotic analysis of certain systems of linear differential equations with a~large parameter},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {2144--2155},
     year = {2009},
     volume = {49},
     number = {12},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_2009_49_12_a4/}
}