1. Yu. I. Zhuravlev, Mathematical Methods in Recognition and Classification Problems (Hafner, 1986; Nauka, Moscow, 1978).
2. Yu. I. Zhuravlev and K. V. Rudakov, “On the Algebraic Correction of Information Processing (Transformation) Procedures,” in Problems of Applied Mathematics and Information Science (Nauka, Moscow, 1987), pp. 187–198 [in Russian].
3. K. V. Rudakov, “Universal and Local Constraints in the Problem of Correction of Heuristic Classification Algorithms,” Kibernetika, No. 2, 30–35 (1987).
4. K. V. Rudakov, “Construction of Problem-Oriented Theories on the Basis of the Algebraic Approach to Pattern Recognition,” Proc. of the MMRO-10 Conference, Moscow, 2001, pp. 113–115 [in Russian].
5. G. V. Nikitov, “On the Solvability and Regularity of Comparison Problems for Text Fragments,” Zh. Vychisl. Mat. Mat. Fiz. 46(4), 761–766 (2006) [Comput. Math. Math. Phys. 46, 726–731 (2006)].