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.
Sara Porat, Michael Yoeli. Towards a Hierarchy of Nets. J. Comput. Syst. Sci., 29(2):198-206, 1984.