Ravichandran, J., and Deepa Santhosh. “Process Capability Indices for Processes When the Underlying Data Are Interval-Valued”. International Journal of Statistics in Medical Research 13 (October 9, 2024): 210–218. Accessed November 24, 2024. https://lifescienceglobal.com/pms/index.php/ijsmr/article/view/9831.