Setiawan, Adrian Tri, and Djarot Hindarto. “Development of a Prototype for a Product Recommendation System Using Blockchain Technology”. International Journal Software Engineering and Computer Science (IJSECS) 5, no. 2 (August 1, 2025): 484–497. Accessed January 10, 2026. https://journal.lembagakita.org/ijsecs/article/view/3855.