Nguyen, Thao Thi Phuong, and Nguyen Van Ninh. “From Lump-Sum to E-Taxation With a Behavioral Analysis of Payment Method Choices Among Informal Retailers”. Journal of ICT Standardization 14, no. 03 (August 9, 2026): 391–420. Accessed August 17, 2026. https://journals.riverpublishers.com/index.php/JICTS/article/view/30789.