HELMANE, Ineta. Thematic Approach of Mathematics Textbooks in the Primary School. SOCIETY. INTEGRATION. EDUCATION. Proceedings of the International Scientific Conference, Rezekne, Latvia, v. 1, p. 65–75, 2015. DOI: 10.17770/sie2012vol1.20. Disponível em: https://journals.ru.lv/index.php/SIE/article/view/20.. Acesso em: 5 may. 2024.