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.
Peter Kall. Approximation to Optimization Problems: An Elementary Review. Math. Oper. Res., 11(1):9-18, 1986. [doi]
Abstract is missing.