@article{ZVMMF_2013_53_8_a6,
     author = {V. A. Beloshapko and V. F. Butuzov},
     title = {A singularly perturbed elliptic problem in the case of a multiple root of the degenerate equation},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {1291--1301},
     publisher = {mathdoc},
     volume = {53},
     number = {8},
     year = {2013},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_2013_53_8_a6/}
}