@article{ZVMMF_1987_27_9_a8,
     author = {G. I. Shishkin},
     title = {Approximation of solutions of singularly perturbed boundary-value problems with a corner boundary layer},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {1360--1374},
     publisher = {mathdoc},
     volume = {27},
     number = {9},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1987_27_9_a8/}
}