@article{ZVMMF_1988_28_7_a13,
     author = {K. N. Belash and A. A. Tret'yakov},
     title = {Methods for solving degenerate problems},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {1097--1102},
     publisher = {mathdoc},
     volume = {28},
     number = {7},
     year = {1988},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1988_28_7_a13/}
}