GULOMOV, Kodir. Contribution margin, dol, and break-even analysis: a financial performance comparison of amazon and walmart (2020–2024).. GREEN ECONOMY AND DEVELOPMENT, [S. l.], v. 3, n. 5, 2025. DOI: 10.5281/zenodo.15655041. Disponível em: https://yashil-iqtisodiyot-taraqqiyot.uz/journal/index.php/GED/article/view/5790. Acesso em: 6 apr. 2026.