Chalaki, Kamyar, and Aliasghar Bazdar. “Robust Economic Design of T2 Control Chart in Variable Sampling Interval Schemes”. International Journal of Industrial Engineering: Theory, Applications and Practice 26, no. 3 (July 20, 2019). Accessed June 19, 2026. https://www.ijietap.com/index.php/ijie/article/view/3749.