Zhou, Chunxiao, Chris E. Zwilling, Vince D. Calhoun, and Michelle Y. Wang. “Efficient Blockwise Permutation Tests Preserving Exchangeability”. International Journal of Statistics in Medical Research 3, no. 2 (April 30, 2014): 134–144. Accessed June 18, 2024. https://www.lifescienceglobal.com/pms/index.php/ijsmr/article/view/1561.