@article{1029000470, author = {Shields, Allen L.}, title = {A note on invariant subspaces.}, journal = {Michigan Math. J.}, volume = {17}, number = {1}, year = {1970}, pages = { 231-233}, language = {en}, url = {http://dml.mathdoc.fr/item/1029000470} }
Shields, Allen L. A note on invariant subspaces.. Michigan Math. J., Tome 17 (1970) no. 1, pp. 231-233. http://gdmltest.u-ga.fr/item/1029000470/