Peter Clement, Etebong. “On the Precision of Estimators in Sampling Surveys by Multi-Parametric Calibration Weightings”. Thailand Statistician 20, no. 3 (June 29, 2022): 655–668. Accessed May 5, 2024. https://ph02.tci-thaijo.org/index.php/thaistat/article/view/246995.