Manahil SidAhmed Mustafa, Sohaib Ahmad, Erum Zahid, Javid Shabbir, and Saadia Masood. “Novel Methods For Estimation Of Population Mean Using Auxiliary Information Under PPS Sampling: Application With Real And Simulated Data Sets ”. Kurdish Studies 12, no. 5 (October 17, 2024): 1553–1562. Accessed October 28, 2025. https://kurdishstudies.net/menu-script/index.php/KS/article/view/3508.