@article{DAN_1963_151_2_a3,
     author = {G. V. Virabyan},
     title = {On the resolvent of an operator},
     journal = {Doklady Akademii Nauk},
     pages = {258--261},
     publisher = {mathdoc},
     volume = {151},
     number = {2},
     year = {1963},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1963_151_2_a3/}
}