Housila P. Singh, Rajesh Tailor, and Varul Patidar. “Study of Some Generalized Classes of Estimators in Probability Proportional to Size Sampling : An Empirical Study”. Journal of the Indian Society of Agricultural Statistics 80, no. 02 (July 30, 2026): 333–355. Accessed August 1, 2026. https://epubs.icar.org.in/index.php/JISAS/article/view/182144.