@article{ZVMMF_2016_56_8_a5,
     author = {V. A. Beloshapko and V. F. Butuzov},
     title = {Asymptotics of the solution to a singularly perturbed elliptic problem with a three-zone boundary layer},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {1428--1440},
     publisher = {mathdoc},
     volume = {56},
     number = {8},
     year = {2016},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_2016_56_8_a5/}
}