Publications
 
 (1986).  On a Search Problem Related to Branch-and-Bound Procedures.  
Proceedings of the 27th Annual Symposium on Foundations of Computer Science.  19-28.
 
 (1998).  On the Complexity of Unsatisfiability Proofs for Random k-CNF Formulas.  
Proceedings of the Thirtieth Annual ACM Symposium on Theory of Computing.  561-571.
 
 (2002).  The Efficiency of Resolution and Davis-Putnamn Procedures.  
31(4), 1048-1075.

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