Researchr is a web site for finding, collecting, sharing, and reviewing scientific publications, for researchers by researchers.
Sign up for an account to create a profile with publication list, tag and review your related work, and share bibliographies with your co-authors.
Frank Wolter, Michael Zakharyaschev. Modal Description Logics: Modalizing Roles. Fundamenta Informaticae, 39(4):411-438, 1999.