@article{1028999975, author = {Halmos, P. R.}, title = {Irreducible operators.}, journal = {Michigan Math. J.}, volume = {15}, number = {1}, year = {1968}, pages = { 215-223}, language = {en}, url = {http://dml.mathdoc.fr/item/1028999975} }
Halmos, P. R. Irreducible operators.. Michigan Math. J., Tome 15 (1968) no. 1, pp. 215-223. http://gdmltest.u-ga.fr/item/1028999975/