1. Aloul, F.A., M.N. Mneimneh and K.A. Sakallah, ZBDD-based backtrack search SAT solver, in: International Workshop on Logic Synthesis, University of Michigan, 2002
2. Refutations by matings;Andrews;IEEE Trans. Computers,1976
3. On matrices with connections;Bibel;JACM,1981
4. Symbolic model checking without BDDs;Biere,1999
5. A machine program for theorem proving;Davis;Journal of the ACM,1962