@article{FAA_1983_17_2_a3,
     author = {A. G. Kostyuchenko and A. A. Shkalikov},
     title = {Self-adjoint quadratic operator pencils and elliptic problems},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {38--61},
     publisher = {mathdoc},
     volume = {17},
     number = {2},
     year = {1983},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1983_17_2_a3/}
}