On the Expressive Power of CNF Formulas of Bounded Tree- and Clique-Width.

Pascal Koiran Klaus Meer On the Expressive Power of CNF Formulas of Bounded Tree- and Clique-Width. 252-263 2008 WG http://dx.doi.org/10.1007/978-3-540-92248-3_23 conf/wg/2008 db/conf/wg/wg2008.html#KoiranMH08