Kumar Gangele, Raj, Gajendra Kumar Vishwakarma, and Shailesh Kumar Choubey. “An Efficient Class on Linear Combination of Ratio Type Estimators for Estimating the Population Mean”. Thailand Statistician 20, no. 2 (March 28, 2022): 284–292. Accessed April 29, 2024. https://ph02.tci-thaijo.org/index.php/thaistat/article/view/246341.