1. Yacc: Yet Another Compiler-Compiler, Bell Laboratories, Murray Hill, NJ, 1978.
2. PCCTS reference manual
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4. and , ‘Adding semantic and syntactic predicates to LL(k) — pred-LL(k)’, Proceedings of the International Conference on Compiler Construction, Edinburgh, Scotland, April 1994.
5. and , Private communications at NeXT Computer, Incorporated, October 1993.