Media type: E-Article Title: Foundations for Extensible Objects with Roles Contributor: Ghelli, Giorgio Published: Elsevier BV, 2002 Published in: Information and Computation, 175 (2002) 1, Seite 50-75 Language: English DOI: 10.1006/inco.2001.2943 ISSN: 0890-5401 Keywords: Computational Theory and Mathematics ; Computer Science Applications ; Information Systems ; Theoretical Computer Science Origination: Footnote: Access State: Open Access