1.
Katsyv S, Kukharchuk V, Kondratenko N, Kucheruk V, Kulakov P, Karabekova D. Development of the fuzzy sets theory: weak operations and extension principles. M [Internet]. 2023 Sep. 30 [cited 2025 Dec. 8];3(111):59-71. Available from: https://mts.buketov.edu.kz/mathematics-vestnik/article/view/583