@article{DAN_1976_228_6_a8,
     author = {S. A. Tersenov},
     title = {On the analyticity of solutions of a class of differential equations degenerating on a boundary},
     journal = {Doklady Akademii Nauk},
     pages = {1294--1297},
     year = {1976},
     volume = {228},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1976_228_6_a8/}
}