@article{DAN_1984_275_5_a5,
     author = {G. A. Gadzhiev},
     title = {On the multiparametric spectral theory of a quadratic operator},
     journal = {Doklady Akademii Nauk},
     pages = {1055--1058},
     publisher = {mathdoc},
     volume = {275},
     number = {5},
     year = {1984},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1984_275_5_a5/}
}