Kolokolnikova, Z. U., and E. A. Kolokolnikova, “Pioneer Movement in the Early 1920s and Its Development in Yenisei Siberia”, Статьи, Pedagogika, 88/7 (2024), 103-11, https://ojs.owebs.ru/pedagogika/article/view/30307, accessed 8 Nov. 2026.