Housila P. Singh, Rajesh Tailor, and Varul Patidar, “Study of Some Generalized Classes of Estimators in Probability Proportional to Size Sampling : An Empirical Study”, JISAS, vol. 80, no. 02, pp. 333–355, Jul. 2026, doi: 10.56093/JISAS.V80I2.5.