Lanka, Surekha, Phothiwong Suwannatat, and Nalinnee Pumhiran. “Review on Blockchain-Based Offline Payment Solutions”. Journal of Trends in Computer Science and Smart Technology 7, no. 4 (January 2, 2026): 768–779. Accessed March 19, 2026. https://irojournals.com/tcsst/article/view/2127.