Eze, Francis, Linus Ifeanyi Onyishi, M. E. Nja, and E. O. Effanga. “Comparisons of Alternative Axial Distances for Cuboidal Regions of Central Composite Designs Using D and G Efficiencies”. MathLAB Journal 4 (December 18, 2019): 58-66. Accessed August 13, 2020. https://purkh.com/index.php/mathlab/article/view/540.