@article{1178245010, author = {Sakai, Sh\^oichir\^o}, title = {The absolute value of $W^*$-algebras of finite type}, journal = {Tohoku Math. J. (2)}, volume = {8}, number = {3}, year = {1956}, pages = { 70-85}, language = {en}, url = {http://dml.mathdoc.fr/item/1178245010} }
Sakai, Shôichirô. The absolute value of $W^*$-algebras of finite type. Tohoku Math. J. (2), Tome 8 (1956) no. 3, pp. 70-85. http://gdmltest.u-ga.fr/item/1178245010/