@article{1102807021, author = {Campbell, Stephen L.}, title = {Linear operators for which $T^*T$ and $T+T^*$ commute. III.}, journal = {Pacific J. Math.}, volume = {79}, number = {2}, year = {1978}, pages = { 17-19}, language = {en}, url = {http://dml.mathdoc.fr/item/1102807021} }
Campbell, Stephen L. Linear operators for which $T^*T$ and $T+T^*$ commute. III.. Pacific J. Math., Tome 79 (1978) no. 2, pp. 17-19. http://gdmltest.u-ga.fr/item/1102807021/