Siringoringo, Yan Batara Putra, Angel Tiovanny, Cindy Berlianti Waruwu, and Jelita Octavia Simanjuntak. “The Selection of an E-Wallet by Mathematics Students at the University of North Sumatra Using the Analytical Hierarchy Process (AHP) Method”. Journal of Research in Mathematics Trends and Technology 5, no. 2 (September 30, 2023): 19–28. Accessed August 4, 2025. https://talenta.usu.ac.id/jormtt/article/view/16873.