Paltsyn, A.A., M.N. Guseva, and N.B. Sviridkina. “Intelligence in Old Age”. Patologicheskaya Fiziologiya i Eksperimental’naya Terapiya (Pathological physiology and experimental therapy) 67, no. 2 (June 27, 2023): 112–117. Accessed November 13, 2026. https://pfiet.ru/article/view/5403.