Samuh, Monjed H., M. Hafidz Omar, and M. Pear Hossain. “Practicality of Some Variations of Ranked Set Sampling”. Austrian Journal of Statistics 49, no. 1 (February 20, 2020): 60-66. Accessed September 28, 2020. https://ajs.or.at/index.php/ajs/article/view/908.