@article{DAN_1973_208_5_a0,
     author = {A. I. Achil'diev},
     title = {On some boundary-value problems for elliptic equations degenerate on the boundary},
     journal = {Doklady Akademii Nauk},
     pages = {1009--1011},
     publisher = {mathdoc},
     volume = {208},
     number = {5},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1973_208_5_a0/}
}