@article{DAN_1970_190_4_a11,
     author = {M. D. Ramazanov},
     title = {Theorems on traces and extensions of functions from surfaces},
     journal = {Doklady Akademii Nauk},
     pages = {784--787},
     year = {1970},
     volume = {190},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1970_190_4_a11/}
}