A Comparative Study of Mudharabah and Musyarakah Contracts on Investment Risk Expenditure in the Small Business Sector  . Journal of Economics, Business and Banking, [S. l.], v. 1, n. 02, 2026. Disponível em: https://jurnal.haizumsaintek.com/index.php/econexus/article/view/88. Acesso em: 4 nov. 2026.