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.
Gong-Liang Chen, Jia-Yan Yao. Characterization of opaque automata. Discrete Mathematics, 247(1-3):65-78, 2002. [doi]
Abstract is missing.