@article{DAN_1978_238_6_a7,
     author = {S. M. Ponomarev},
     title = {On an eigenvalue problem for the {Lavrent'ev--Bicadze} equation},
     journal = {Doklady Akademii Nauk},
     pages = {1299--1302},
     publisher = {mathdoc},
     volume = {238},
     number = {6},
     year = {1978},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1978_238_6_a7/}
}