Jambulingam, Subramani, and Ajith S. Master. “Almost Unbiased Ratio Cum Product Estimator for Finite Population Mean With Known Median in Simple Random Sampling”. Nepalese Journal of Statistics 1 (December 29, 2017): 1–14. Accessed April 28, 2024. https://www.nepjol.info/index.php/NJS/article/view/18813.