Niklas Eén, Armin Biere. Effective Preprocessing in SAT Through Variable and Clause Elimination. In Fahiem Bacchus, Toby Walsh, editors, Theory and Applications of Satisfiability Testing, 8th International Conference, SAT 2005, St. Andrews, UK, June 19-23, 2005, Proceedings. Volume 3569 of Lecture Notes in Computer Science, pages 61-75, Springer, 2005. [doi]