@article{ZNSL_1996_232_a8,
     author = {V. V. Kapustin},
     title = {One-dimensional perturbations of singular unitary operators},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {118--122},
     publisher = {mathdoc},
     volume = {232},
     year = {1996},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1996_232_a8/}
}