@article{GDZPPN00126303X, title = {Spectral mapping theorem for integrated semigroups.}, journal = {Semigroup forum}, volume = {46}, year = {1993}, pages = {359-372}, zbl = {0812.47036}, url = {http://dml.mathdoc.fr/item/GDZPPN00126303X} }
Day, C.R. Spectral mapping theorem for integrated semigroups.. Semigroup forum, Tome 46 (1993) pp. 359-372. http://gdmltest.u-ga.fr/item/GDZPPN00126303X/