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.
S. Barry Cooper, Andrew E. M. Lewis, Yue Yang. Properly Sigma::2:: minimal degrees and 0 complementation. Math. Log. Q., 51(3):274-276, 2005. [doi]