@article{PORMA_1960__19_4_114843,
     author = {Foias, C.},
     title = {Remarques sur les semi-groupes distributions d'op\'erateurs normaux},
     journal = {Portugaliae mathematica},
     pages = {227--242},
     publisher = {mathdoc},
     volume = {19},
     number = {4},
     year = {1960},
     mrnumber = {0143044},
     zbl = {0103.09101},
     language = {fr},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1960__19_4_114843/}
}