Ikwuoche John, David, Asiribo Osebekwin Ebenezer, and Dikko Hussaini Garba. “A Weibull Split-Plot Design Model and Analysis”. Thailand Statistician 20, no. 2 (March 28, 2022): 420–434. Accessed May 6, 2024. https://ph02.tci-thaijo.org/index.php/thaistat/article/view/246350.