Felysia, Fanny Leonita, and Tanty Oktavia. “Enhancing Trust in Digital Procurement: The Role of E-Signature and Information Quality in Billing System Adoption Among SMEs”. International Journal of Advances in Data and Information Systems, vol. 7, no. 2, Aug. 2026, pp. 635-44, https://doi.org/10.59395/ijadis.v7i2.1555.