Kozlov, A.I., D.S. Kornienko, G.G. Vershubsky, M.L. Otavina, and M.A. Negasheva. 2016. “HORMONES AND PROSPECTS: PSYCHOLOGICAL AND ENDOCRINE CHARACTERISTICS OF CHRONIC ANXIETY AND STRESS AMONG SCHOOLCHILDREN AND STUDENTS OF THE ‘THREE RUSSIAS’”. Perm Federal Research Centre Journal, no. 4 (March): 97-105. https://journal.permsc.ru/index.php/pscj/article/view/PSCJ2015n4p10.