@article{DAN_1978_243_3_a7,
     author = {O. I. Panich},
     title = {The connection between adjoint boundary value problems and mutually adjoint pseudodifferential equations on the boundary of a domain},
     journal = {Doklady Akademii Nauk},
     pages = {580--583},
     publisher = {mathdoc},
     volume = {243},
     number = {3},
     year = {1978},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1978_243_3_a7/}
}