M R, I., R, M., K, A. and S, T. 2023. On Past Extropy and Negative Cumulative Extropy Properties of Ranked Set Sampling and Maximum Ranked Set Sampling with Unequal Samples. Statistics, Optimization & Information Computing. 11, 3 (Apr. 2023), 740-754. DOI:https://doi.org/10.19139/soic-2310-5070-1453.