@article{FAA_1977_11_4_a16,
     author = {A. G. Kostyuchenko and M. B. Orazov},
     title = {The completeness of root vectors in certain self-adjoint quadratic bundles},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {85--87},
     publisher = {mathdoc},
     volume = {11},
     number = {4},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1977_11_4_a16/}
}