Reference:
T. Eiter, P. Kilpeläinen, and Heikki Mannila. Recognizing renamable generalized propositional horn formulas is np-complete. Discrete Applied Mathematics, 59:23–31, 1995.
Suggested BibTeX entry:
@article{ekmdam,
author = {T. Eiter and P. Kilpel{\"a}inen and Heikki Mannila},
journal = {Discrete Applied Mathematics},
pages = {23-31},
title = {Recognizing renamable generalized propositional Horn formulas is NP-complete},
volume = {59},
year = {1995},
}
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