Shamsuddeen Ahmad Sabo , O.O Ishaq , Abdulhameed Ado Osi , Ahmed Shuaibu, Ibrahim Zakariyya Musa , Abdulmutallib Adamu Digawa , Chandrapal Singh Chouhan, “IMPROVED RATIO-TYPE ESTIMATORS FOR POPULATION MEAN UNDER SIMPLE RANDOM SAMPLING”, Journal of Computational Analysis and Applications (JoCAAA), vol. 34, no. 2, pp. 81–103, Feb. 2025.