FELDMAN, M.A.; BASOV, N.A. Regulation of supplementary education for children and teenagers in the region: the problem of efficiency and regulatory instruments. Management Issues, [S. l.], v. 17, n. 5, p. 179–185, 2015. Disponível em: https://voprosy-upravleniya.owebs.ru/article/view/24204. Acesso em: 9 nov. 2026.