LIQUIDITY MANAGEMENT CONSTRAINTS AND OPERATIONAL EFFICIENCY IN ISLAMIC BANKING SYSTEMS IN SUB-SAHARA AFRICA. I-Finance: a Research Journal on Islamic Finance, [S. l.], v. 12, n. 1, p. 19–34, 2026. DOI: 10.19109/ifinance.v12i1.34748. Disponível em: https://jurnal.radenfatah.ac.id/index.php/I-Finance/article/view/34748.. Acesso em: 9 jun. 2026.