E. F. . Ologunleko, . . P. I. . Ogunyinka, O. E. . Ologunleko, and A. A. . . . . . . . Sodipo, “ Generalized Multivariate Mixture Ratio Estimators for the Population Mean in Multi-Phase Sampling using Multi-Auxiliary Characteristics”, IQJOSS, vol. 23, no. 1, pp. 104–116, Jun. 2026.