@article{ZNSL_1974_47_a9,
     author = {M. S. Brodskii and Ya. S. Shvartsman},
     title = {Root lineals and characteristic functions of contractions},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {155--158},
     publisher = {mathdoc},
     volume = {47},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1974_47_a9/}
}