@article{DAN_1978_240_6_a1,
     author = {V. P. Didenko},
     title = {A variational method of solving boundary value problems whose operator is not symmetric},
     journal = {Doklady Akademii Nauk},
     pages = {1277--1280},
     year = {1978},
     volume = {240},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1978_240_6_a1/}
}