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.
L. Liu, X. Liu. Block appointment systems for outpatient clinics with multiple doctors. JORS, 49(12):1254-1259, 1998. [doi]
Abstract is missing.