Muhammad Firdaus Al Farohi, Muhammad Jamie Rofie Quality, and As'ary Ricklas Hidayat. “Unraveling The Supply-Side Factors Shaping East Java’s Economy: Insights From PCA and Machine Learning”. INTERNATIONAL JOURNAL OF ECONOMICS AND MANAGEMENT REVIEW 1, no. 3 (September 30, 2023): 1–20. Accessed April 17, 2026. https://jurnal.smartindo.org/index.php/ijemr/article/view/162.