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.
Wei-Ping Liu, Ivan Rival. Enumerating orientations of ordered sets. Discrete Mathematics, 88(2-3):239-247, 1991. [doi]
Abstract is missing.