USMANOV, Mahsud; SAIPNAZAROV, Jonibek. The Concept of Number. The Establishment of the Concept of Natural Number and Zero. INDEXING, [S. l.], v. 1, n. 1, p. 61–65, 2024. Disponível em: https://academicsbook.com/index.php/indexing/article/view/144. Acesso em: 11 jan. 2025.