@article{ZVMMF_1969_9_4_a7,
     author = {N. S. Bakhvalov},
     title = {On the optimization of the methods for solving boundary value problems in the presence of a boundary layer},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {841--859},
     publisher = {mathdoc},
     volume = {9},
     number = {4},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1969_9_4_a7/}
}