Erkinbek G.M. and Kyrbassova E.A. (2025) “COGNITIVE DEVELOPMENT OF SCHOOLCHILDREN: THE INTERRELATIONSHIP BETWEEN BIOLOGICAL RHYTHMS AND VITAMINS”, Foundations and Trends in Modern Learning, (11). Available at: https://ojs.publisher.agency/index.php/FTML/article/view/7257 (Accessed: 10 June 2026).