Grover , Lovleen, and Anchal Sharma. “Improved Classes of Logarithmic Type Estimators of Finite Population Mean in Case of Missing Data”. Brazilian Journal of Biometrics 44, no. 1 (March 2, 2026): e-44847. Accessed March 3, 2026. http://200.131.250.9/index.php/BBJ/article/view/847.