@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/