@article{04210863, title = {Certain invariant subspaces for operators with rich eigenvalues.}, journal = {International Journal of Mathematics and Mathematical Sciences}, volume = {14}, year = {1991}, pages = {69-76}, doi = {10.1155/S0161171291000066}, zbl = {0732.47008}, language = {en}, url = {http://dml.mathdoc.fr/item/04210863} }
Seddighi, Karim. Certain invariant subspaces for operators with rich eigenvalues.. International Journal of Mathematics and Mathematical Sciences, Tome 14 (1991) pp. 69-76. doi : 10.1155/S0161171291000066. http://gdmltest.u-ga.fr/item/04210863/