@article{10_14708_cm_v23i2_6058,
     author = {J. Janas},
     title = {Spectral inclusion theorems for commuting subnormal pair},
     journal = {Commentationes Mathematicae},
     pages = { 219--229},
     publisher = {mathdoc},
     volume = {23},
     number = {2},
     year = {1983},
     doi = {10.14708/cm.v23i2.6058},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/cm.v23i2.6058/}
}