@article{1028998431, author = {Putnam, C. R.}, title = {Group commutators of bounded operators in Hilbert space.}, journal = {Michigan Math. J.}, volume = {7}, number = {1}, year = {1960}, pages = { 229-232}, language = {en}, url = {http://dml.mathdoc.fr/item/1028998431} }
Putnam, C. R. Group commutators of bounded operators in Hilbert space.. Michigan Math. J., Tome 7 (1960) no. 1, pp. 229-232. http://gdmltest.u-ga.fr/item/1028998431/