Media type: E-Article Title: Lecture Notes in Mathematics: Operational calculus and semi-groups of operators Contributor: Komatsu, Hikosaburo imprint: Springer Berlin Heidelberg, 1993 Published in: Lecture Notes in Mathematics Language: Not determined DOI: 10.1007/bfb0085481 ISSN: 0075-8434; 1617-9692 Origination: Footnote: