M R I, R M, K A, S T. On Past Extropy and Negative Cumulative Extropy Properties of Ranked Set Sampling and Maximum Ranked Set Sampling with Unequal Samples. Stat., optim. inf. comput. [Internet]. 2023Apr.21 [cited 2024Nov.15];11(3):740-54. Available from: http://47.88.85.238/index.php/soic/article/view/1453