Grover, Lovleen Kumar, and Amanpreet Kaur. “An Improved Exponential Type Estimator Of Population Mean of Sensitive Variable Using Optional Randomized Response Technique”. Pakistan Journal of Statistics and Operation Research 15, no. 1 (March 22, 2019): 49-59. Accessed February 2, 2023. https://pjsor.com/pjsor/article/view/2588.