* Noam Chomsky, Three models for the description of language, IRE Transactions on Information Theory, 2 (1956), pp. 113-124 |
* Noam Chomsky: Three models for the description of language, IRE Transactions on Information Theory, 2 (1956), pages 113-124 * Noam Chomsky: On certain formal properties of grammars, Information and Control, 1 (1959), pages 91-112 |