@article{ZVMMF_1995_35_4_a7,
     author = {G. I. Shishkin},
     title = {Mesh approximation of singularly perturbed boundary-value problems for systems of elliptic and parabolic equations},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {542--564},
     year = {1995},
     volume = {35},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1995_35_4_a7/}
}