@article{DAN_1974_219_1_a4,
     author = {A. A. Dezin},
     title = {A description of regular operators},
     journal = {Doklady Akademii Nauk},
     pages = {27--30},
     year = {1974},
     volume = {219},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1974_219_1_a4/}
}