RashidM. Mushfiqur, Joseph W. McKean, and John D. Kloke. “Rank-Based Analysis of Unbalanced Repeated Measures Data”. Pakistan Journal of Statistics and Operation Research 8, no. 3 (July 1, 2012): 719-735. Accessed June 14, 2025. https://pjsor.com/pjsor/article/view/538.