Vinay Kumar Yadav and Shakti Prasad, “Neutrosophic Estimators in Two-Phase Survey Sampling”, Neutrosophic Sets Syst., vol. 61, pp. 534–578, Dec. 2023, Accessed: Apr. 03, 2025. [Online]. Available: https://fs.unm.edu/nss8/index.php/111/article/view/3813