@article{DAN_1958_119_5_a6,
     author = {A. V. Kuzhel'},
     title = {The reduction of unbounded not self-adjoined operators to a triangular form},
     journal = {Doklady Akademii Nauk},
     pages = {868--871},
     publisher = {mathdoc},
     volume = {119},
     number = {5},
     year = {1958},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1958_119_5_a6/}
}