KAMOLIDIN SHODIYEV,. EXTENSIVE USE OF MATHEMATICAL METHODS IS AN IMPORTANT FACTOR IN IMPROVING ECONOMIC ANALYSIS. International Engineering Journal For Research & Development, [S. l.], v. 6, n. 3, p. 1–9, 2021. DOI: 10.17605/OSF.IO/V2WKN. Disponível em: http://www.iejrd.com/index.php/iejrd/article/view/2144. Acesso em: 17 apr. 2026.