Feldman, M.A., and N.A. Basov. “Regulation of Supplementary Education for Children and Teenagers in the Region: The Problem of Efficiency and Regulatory Instruments”. Management Issues 17, no. 5 (May 15, 2015): 179–185. Accessed November 8, 2026. https://voprosy-upravleniya.owebs.ru/article/view/24204.