@article{1102636494, author = {Kissin, Edward}, title = {Indices of unbounded derivations of $C^*$-algebras.}, journal = {Pacific J. Math.}, volume = {156}, number = {2}, year = {1992}, pages = { 125-150}, language = {en}, url = {http://dml.mathdoc.fr/item/1102636494} }
Kissin, Edward. Indices of unbounded derivations of $C^*$-algebras.. Pacific J. Math., Tome 156 (1992) no. 2, pp. 125-150. http://gdmltest.u-ga.fr/item/1102636494/