Rofi'i, Yulianto Umar. “Oreste Besson Rank and Certainty Factor for Digital Business Investment Decisions”. International Journal Software Engineering and Computer Science (IJSECS) 3, no. 2 (August 28, 2023): 130–136. Accessed February 4, 2026. https://journal.lembagakita.org/ijsecs/article/view/1513.