@article{ZVMMF_1990_30_7_a5,
     author = {I. A. Blatov},
     title = {The projection method for singularly perturbed boundary value problems},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {1031--1044},
     publisher = {mathdoc},
     volume = {30},
     number = {7},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1990_30_7_a5/}
}