@article{DAN_1967_173_3_a2,
     author = {I. I. Volkov},
     title = {Linear transformations of unbounded complex sequences},
     journal = {Doklady Akademii Nauk},
     pages = {495--498},
     publisher = {mathdoc},
     volume = {173},
     number = {3},
     year = {1967},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1967_173_3_a2/}
}