Grigoryan, T. A., & Hayrapetyan, M. S. (2021). MEASUREMENT OF DISTANCE BETWEEN REGULAR EVENTS FOR MULTITAPE AUTOMATA BASED ON A NEW CHARACTERIZATION OF EQUIVALENCE CLASSES. Proceedings of the YSU A: Physical and Mathematical Sciences, 55(1 (254), 72–80. https://doi.org/10.46991/PYSU:A/2021.55.1.072