@article{ZVMMF_1963_3_4_a0,
     author = {A. V. Vasilieva},
     title = {Asymptotic methods in the theory of ordinary differential equations containing small parameters in front of the higher derivatives},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {611--642},
     publisher = {mathdoc},
     volume = {3},
     number = {4},
     year = {1963},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1963_3_4_a0/}
}