@article{IVM_1968_4_a9,
     author = {V. M. Ryabtseva},
     title = {The continuous spectrum of a~closed isometric operator and of its minimal unitary extension that goes out of the space},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {63--69},
     publisher = {mathdoc},
     number = {4},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1968_4_a9/}
}