@article{ZVMMF_1989_29_7_a0,
     author = {G. I. Shishkin},
     title = {Approximation of solutions of singularly perturbed boundary value problems with a parabolic boundary layer},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {963--977},
     publisher = {mathdoc},
     volume = {29},
     number = {7},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1989_29_7_a0/}
}