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[2] Klima E. S.: Current Developements in Generative Grammar. Kybernetika 1 (1965), No. 2, pp. 184-197.

[3] Matthews G. H.: Analysis by Synthesis of Sentences of Natuгal Languages. In Proceedings of the 1961 International Conference on Machine Translatioп of Languages and Applied Language Analysis, National Physical Laboratory, Symposium No. 13, pp. 531-542, London 1962.

[4] Chomsky N.: Syntactic Structures. The Hague 1957.

[5] Chomsky N.: On Certain Formal Properties of Grammars. Information and Control 2 (1959), pp. 137-167. MR 0105365 | Zbl 0161.00804