Podayeva, N. G., Podayev, M. V. e Agafonov, P. A. (2019) “The social and cultural approach to forming geometric concepts among schoolchildren”, Amazonia Investiga, 8(20), p. 459–467. Disponível em: https://mail.amazoniainvestiga.info/index.php/amazonia/article/view/175 (Acessado: 6 novembro 2026).