Shafoat Eshonqulova, Sherzad Eshangulov, and Munisa Shodmonova. “THE CONCEPT OF NATURAL NUMBER AND ZERO”. Galaxy International Interdisciplinary Research Journal 11, no. 3 (March 23, 2023): 244–246. Accessed December 25, 2024. https://giirj.com/index.php/giirj/article/view/4800.