@article{10_4064_sm_124_3_259_267,
     author = {Krzysztof M.  Fr\k{a}czek},
     title = {Cyclic space isomorphism of unitary operators},
     journal = {Studia Mathematica},
     pages = {259--267},
     publisher = {mathdoc},
     volume = {124},
     number = {3},
     year = {1997},
     doi = {10.4064/sm-124-3-259-267},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-124-3-259-267/}
}