@article{DAN_1966_170_5_a7,
     author = {O. I. Panich},
     title = {Elliptic boundary value problems with a parameter only in the boundary conditions},
     journal = {Doklady Akademii Nauk},
     pages = {1020--1023},
     publisher = {mathdoc},
     volume = {170},
     number = {5},
     year = {1966},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1966_170_5_a7/}
}