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@article{SF_1990__41_2_135050, author = {N. Tanaka}, title = {On perturbation theory for exponentially bounded {C-semigroups.}}, journal = {Semigroup forum}, pages = {215--236}, publisher = {mathdoc}, volume = {41}, number = {2}, year = {1990}, zbl = {0698.47025}, url = {http://geodesic.mathdoc.fr/item/SF_1990__41_2_135050/} }
N. Tanaka. On perturbation theory for exponentially bounded C-semigroups.. Semigroup forum, Tome 41 (1990) no. 2, pp. 215-236. http://geodesic.mathdoc.fr/item/SF_1990__41_2_135050/