Kushnir В. А. . TRENDS AND FACTORS OF MATHEMATICAL EDUCATION AND THEIR REFLECTION IN TEXTBOOKS. Problems of the modern textbook, [S. l.], n. 15, p. 317–326, 2015. Disponível em: https://ipvid.org.ua/index.php/psp/article/view/473. Acesso em: 18 may. 2024.