@article{1138843233, author = {Umegaki, Hisaharu}, title = {Operator algebra of finite class}, journal = {Kodai Math. Sem. Rep.}, volume = {4}, number = {1}, year = {1952}, pages = { 123-129}, language = {en}, url = {http://dml.mathdoc.fr/item/1138843233} }
Umegaki, Hisaharu. Operator algebra of finite class. Kodai Math. Sem. Rep., Tome 4 (1952) no. 1, pp. 123-129. http://gdmltest.u-ga.fr/item/1138843233/