XUDOYBERDIYEVICH, R. J. . Natural Numbers and Operations on Them, Fundamentals of the Fundamental Theory of Arithmetic. American Journal of Social and Humanitarian Research, [S. l.], v. 3, n. 12, p. 13–16, 2022. DOI: 10.31150/ajshr.v3i12.1769. Disponível em: https://globalresearchnetwork.us/index.php/ajshr/article/view/1769. Acesso em: 16 may. 2024.