@article{1103901561, author = {Bratteli, Ola and Haagerup, Uffe}, title = {Unbounded derivations and invariant states}, journal = {Comm. Math. Phys.}, volume = {58}, number = {1}, year = {1978}, pages = { 79-95}, language = {en}, url = {http://dml.mathdoc.fr/item/1103901561} }
Bratteli, Ola; Haagerup, Uffe. Unbounded derivations and invariant states. Comm. Math. Phys., Tome 58 (1978) no. 1, pp. 79-95. http://gdmltest.u-ga.fr/item/1103901561/