@article{DAN_1974_214_2_a13,
     author = {G. V. Radzievskii},
     title = {On a method of proving completeness of the root vectors of operator-valued functions},
     journal = {Doklady Akademii Nauk},
     pages = {291--294},
     publisher = {mathdoc},
     volume = {214},
     number = {2},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1974_214_2_a13/}
}