1. Discrete Mathematics and Mathematical Problems of Cybernetics, Ed. by S. V. Yablonsky and O. B. Lupanov (Nauka, Moscow, 1974), Vol. 1.
2. I. Platonenko, Implementation of Kora-type algorithms by systems of special Boolean equations (Vychisl. Tsentr Akad. Nauk SSSR, Moscow, 1983) [in Russian].
3. L. V. Baskakova and Yu. I. Zhuravlev, “A model of recognition algorithms with representative samples and systems of supporting sets,” USSR Comput. Math. Math. Phys. 21(5), 189–199 (1981).
4. U. A. Abdugaliev, “On normal forms of k-valued logic,” Kibernetika, No. 1, 16–20 (1967).
5. A. N. Nurlybaev, “On normal forms of k-valued logic,” in Collected Papers on Mathematical Cybernetics (Vychisl. Tsentr Akad. Nauk SSSR, Moscow, 1976), No. 1, pp. 56–68 [in Russian].