@article{DAN_1971_198_1_a13,
     author = {R. S. \`Efendiev},
     title = {Asymptotic solution of a boundary value problem for an elliptic equation degenerating with respect to a small parameter into a parabolic equation},
     journal = {Doklady Akademii Nauk},
     pages = {54--57},
     publisher = {mathdoc},
     volume = {198},
     number = {1},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1971_198_1_a13/}
}