Wazir, Shumaila, Muhammd Atif, and Mujeeb Hussain. “Improved Exponential Ratio-Cum-Regression Type Estimators under Stratified Random Sampling for Population Mean”. VFAST Transactions on Mathematics 13, no. 2 (December 31, 2025): 75–89. Accessed May 14, 2026. https://vfast.org/journals/index.php/VTM/article/view/2054.