@article{IVM_1968_5_a10,
     author = {V. M. Ryabtseva},
     title = {A~class of spectral functions of a~closed isometric operator with finite defect indices},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {80--85},
     publisher = {mathdoc},
     number = {5},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1968_5_a10/}
}