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.
Kian-Lee Tan, Cheng Hian Goh, Beng Chin Ooi. Progressive evaluation of nested aggregate queries. VLDB J., 9(3):261-278, 2000. [doi]