@article{DAN_1966_166_1_a1,
     author = {Dzh. \`E. Allakhverdiev},
     title = {Multiply complete systems and nonselfadjoint operators depending on a parameter~$\lambda$},
     journal = {Doklady Akademii Nauk},
     pages = {11--14},
     publisher = {mathdoc},
     volume = {166},
     number = {1},
     year = {1966},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1966_166_1_a1/}
}