@article{ZVMMF_1999_39_9_a6,
     author = {A. B. Vasil'eva and M. A. Davydova},
     title = {Singularly perturbed second-order equation with small parameters multiplying the first and second derivatives},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {1504--1512},
     publisher = {mathdoc},
     volume = {39},
     number = {9},
     year = {1999},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1999_39_9_a6/}
}