Khalil Hassan, Marwa, Manal Ibrahim Alohali, and Fatimah Abdulaziz Alojail. 2021. “Point and Interval Estimators of R=P[Y < X] Based on Gompertz Distribution and Ranked Set Sampling Data”. Thailand Statistician 19 (4):784-96. https://ph02.tci-thaijo.org/index.php/thaistat/article/view/245239.