@article{10_4064_sm_26_3_239_245,
     author = {C. Foia\c{s} and W. Malk},
     title = {The extended spectrum of completely non-unitary contractions and the spectral mapping theorem},
     journal = {Studia Mathematica},
     pages = {239--245},
     publisher = {mathdoc},
     volume = {26},
     number = {3},
     year = {1965},
     doi = {10.4064/sm-26-3-239-245},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-26-3-239-245/}
}