@article{GDZPPN001260634, title = {On perturbation theory for exponentially bounded C-semigroups.}, journal = {Semigroup forum}, volume = {40}, year = {1990}, pages = {215-236}, zbl = {0698.47025}, url = {http://dml.mathdoc.fr/item/GDZPPN001260634} }
Tanaka, N. On perturbation theory for exponentially bounded C-semigroups.. Semigroup forum, Tome 40 (1990) pp. 215-236. http://gdmltest.u-ga.fr/item/GDZPPN001260634/