Kumar Tiwari, Kuldeep, and Puneet Kumar. “An Efficient Class of Estimators for Finite Population Mean Using Auxiliary Variable”. Thailand Statistician 20, no. 4 (September 29, 2022): 754–765. Accessed May 4, 2024. https://ph02.tci-thaijo.org/index.php/thaistat/article/view/247458.