Nyingmeh, B.N. 2026. From Payments to Profits: Business Operational Efficiency as a Mediator of the Impact of Digital Financial Services on the Financial Performance of Cameroonian SMEs. Journal of Economic, Finance Research and Review. 2, 08 (Aug. 2026), 515–527. DOI:https://doi.org/10.65150/EP-jefrr/V2E8/2026-05.