@article{1102785708, author = {Cowen, Carl C.}, title = {Commutants and the operator equations $AX=\lambda XA$.}, journal = {Pacific J. Math.}, volume = {85}, number = {2}, year = {1979}, pages = { 337-340}, language = {en}, url = {http://dml.mathdoc.fr/item/1102785708} }
Cowen, Carl C. Commutants and the operator equations $AX=\lambda XA$.. Pacific J. Math., Tome 85 (1979) no. 2, pp. 337-340. http://gdmltest.u-ga.fr/item/1102785708/