Rahmayana, Putri Elsari, Humiras Hardi Purba, and Budi Susetyo. “Improving Ballastless Track Quality Using Project Quality Management and SmartPLS”. ComTech: Computer, Mathematics and Engineering Applications 12, no. 1 (April 28, 2021): 19-32. Accessed March 28, 2025. https://journal.binus.ac.id/index.php/comtech/article/view/6616.