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.
Etsuro Moriya, Friedrich Otto. Two Ways of Introducing Alternation into Context-Free Grammars and Pushdown Automata. IEICE Transactions, 90-D(6):889-894, 2007. [doi]
Abstract is missing.