@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/