1. E. T. Irons, ?The structure and use of the syntax-directed compiler,? in: Annual Review in Automatic Programming, Vol. 3 (1962).
2. E. T. Irons, ?An error-correcting parser algorithm,? Commun. ACM,6, No. 11 (1963).
3. J. Earley, ?An efficient context-free parser algorithm,? Commun. ACM,6, No. 7 (1963).
4. V. A. Vasil'ev, ?On constructions in formal languages,? Zh. Vychisl. Mat. Mat. Fiz.,6, No. 4 (1966).
5. L. V. Ukhov, ?Program for checking syntactic correctness of the input program,? in: Translator TA-2M [in Russian], Part 1, Moscow (1969).