Susilawati, Anita, et al. “Defining Action Plans to Reduce Defects in a Paper Production Line Using Statistical Process Control and Fuzzy Analytical Hierarchy Procedure”. International Journal of Integrated Engineering, vol. 17, no. 9, Dec. 2025, pp. 135-48, https://publisher.uthm.edu.my/ojs/index.php/ijie/article/view/19208.