1. The Cauchy problem and a generalization of the Hille-Yosida theorem;Davies,1987
2. Nouveau-type semigroups;Da Prato;C. R. Acad. Sci. Paris Sér. A–B,1966
3. Semigruppi regolarizzabili;Da Prato;Ricerche Mat.,1966
4. Semigroups of Linear Operators and Applications;Goldstein,1985
5. Functional Analysis and Semi-Groups;Hille,1957