@article{ZNSL_1974_39_a17,
     author = {B. Z. Moroz},
     title = {States in quantum mechanics and a~problem of the operator theory},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {189--190},
     publisher = {mathdoc},
     volume = {39},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1974_39_a17/}
}