Sangngam, Prayad, Wipawan Laoarun, and Manachai Rodchuen. “Adjusted Clustered Rank Tests for Clustered Data in Unbalanced Design”. Thailand Statistician 20, no. 2 (March 28, 2022): 435–451. Accessed May 2, 2024. https://ph02.tci-thaijo.org/index.php/thaistat/article/view/246351.