@article{DAN_1964_155_1_a5,
     author = {L. S. Gol'denshtein},
     title = {Criteria for one-sided invertibility of functions of several isometric operators and their applications},
     journal = {Doklady Akademii Nauk},
     pages = {28--31},
     publisher = {mathdoc},
     volume = {155},
     number = {1},
     year = {1964},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1964_155_1_a5/}
}