R. Dumeh and L. Agyepong, “Payment Interoperability and Cross-Border SME Trade in Africa: The Roles of Transaction Efficiency, Regulatory Fragmentation and Transaction Costs: Deconstructing Cross-Border Payment Frictions, PAPSS Dynamics, and Institutional Governance under the AfCFTA”, PAJRI-BFM, vol. 1, no. 1-2, pp. 67–77, Sep. 2026, doi: 10.69010/pajri-bfm.46.