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.
Mikhail V. Volkov. Reflexive Relations, Extensive Transformations and Piecewise Testable Languages of a Given Height. IJAC, 14(5-6):817-827, 2004. [doi]