Selected papers that cite this one
- Dennis F. Cudia. General problems of formal grammars. Journal of the ACM, 17(1):31-43, January 1970.
Selected references
- David G. Cantor. On the ambiguity problem of Backus systems. Journal of the ACM, 9(4):477-479, October 1962.
- Noam Chomsky. A note on phrase structure grammars. Information and Control, 2(4):393-395, December 1959.