The Undecidability of the Disjunction Property of Propositional Logics and Other Related Problems
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\begin{bibtex} @article{DBLP:journals/jsyml/ChagrovZ93,
author = {Alexander V. Chagrov and
Michael Zakharyaschev},
title = {The Undecidability of the Disjunction Property of Propositional
Logics and Other Related Problems},
journal = {J. Symb. Log.},
volume = {58},
number = {3},
year = {1993},
pages = {967-1002},
bibsource = {DBLP, http://dblp.uni-trier.de}
}
\end{bibtex}
