SavchukB., RomanyshynR., KhimchukL., and VysochanL. “FORMATION COGNITIVE FLEXIBILITY AS A BASIC COMPETENCE OF A FUTURE TEACHER: SCIENTIFIC AND THEORETICAL SUBSTANTIATION THIS PROBLEM”. Mountain School of Ukrainian Carpaty, no. 25, Oct. 2021, pp. 102-6, https://scijournals.pnu.edu.ua/index.php/msuc/article/view/5811.