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.
Rakesh Agrawal, Linda G. DeMichiel. Type derivation using the projection operation. Inf. Syst., 19(1):55-68, 1994.
Abstract is missing.