“Measure of Slope Rotatability for Second Order Response Surface Designs Under Tri-Diagonal Correlation Error Structure Using Central Composite Designs: Measure of Slope Rotatability with Tri-Diagonal Error Stricture Using CCD” (2020) Journal of the Kerala Statistical Association, 31(1), pp. 85–104. Available at: https://ojs.ksa.org.in/index.php/JKSA/article/view/34 (Accessed: 17 October 2026).