المدرس دڵشاد محمود صالح, المدرس المساعد هۆشمەند رفيق إبراهيم, and المدرس المساعد دەشتى إسماعيل جميل. “Use Six Sigma Technique to Configure the Plate Ratio of Defective Units for Quality Control and Compare Them With Plate Ratio of Defective Units Using Three Sigma With the Application”. QALAAI ZANIST JOURNAL 3, no. 4 (January 24, 2021): 756–772. Accessed July 3, 2024. https://journal.lfu.edu.krd/ojs/index.php/qzj/article/view/337.