@article{ZVMMF_2011_51_1_a3,
     author = {V. F. Butuzov},
     title = {On periodic solutions to singularly perturbed parabolic problems in the case of multiple roots of the degenerate equation},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {44--55},
     publisher = {mathdoc},
     volume = {51},
     number = {1},
     year = {2011},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_2011_51_1_a3/}
}