@article{10_4064_sm_54_3_259_266,
     author = {Marek S{\l}oci\'nski},
     title = {Normal extensions of commutative subnormal operators},
     journal = {Studia Mathematica},
     pages = {259--266},
     publisher = {mathdoc},
     volume = {54},
     number = {3},
     year = {1975},
     doi = {10.4064/sm-54-3-259-266},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-54-3-259-266/}
}