Zaitsev, G. F. (2021) “CONTRIBUTION OF ACADEMICIAN OF THE AS UkrSSR A. I. KUKHTENKO AND HIS SCHOOLS INTO THE THEORY OF INVARIANCE”, Problems of Informatization and Control, 2(11), pp. 29–32. Available at: http://jrnl.kai.edu.ua/index.php/PIU/article/view/15913 (Accessed: 14 June 2026).