@article{DAN_1958_122_6_a0,
     author = {Yu. M. Berezanskii},
     title = {On the boundary value problems for general partial differential operators},
     journal = {Doklady Akademii Nauk},
     pages = {959--962},
     year = {1958},
     volume = {122},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1958_122_6_a0/}
}