1. Compilers: Principles, Techniques, and Tools;Aho,1986
2. Faster generalised LR parsing;Aycock,1999
3. Even faster generalised LR parsing;Aycock;Acta Informatica,2001
4. Claus Brabrand, Grambiguity, 2006. http://www.brics.dk/brabrand/grambiguity/
5. Efficient computation of LALR (1) look-ahead sets;DeRemer;ACM Transactions on Programming Languages and Systems,1982