Dar, Ab Latif, and J. R. Singh. “THE POWER OF X-CHART IN PRESENCE OF DATA CORRELATION”. Journal of Reliability and Statistical Studies 8, no. 01 (June 1, 2015): 25–30. Accessed May 15, 2026. https://journals.riverpublishers.com/index.php/JRSS/article/view/21067.