@article{DAN_1965_163_3_a9,
     author = {O. A. Oleinik},
     title = {On the smoothness of solutions of degenerating elliptic and parabolic equations},
     journal = {Doklady Akademii Nauk},
     pages = {577--580},
     publisher = {mathdoc},
     volume = {163},
     number = {3},
     year = {1965},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1965_163_3_a9/}
}