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.
Aldo de Luca, Antonio Restivo, Sergio Salemi. On the Centers of a Language. Theoretical Computer Science, 24:21-34, 1983.
Abstract is missing.