Usman, U., and Y. Aliyu. “Bivariate Nadarajah-Haghighi Distribution Derived from Copula Functions: Bayesian Estimation and Applications”. Benin Journal of Statistics 5, no. 1 (May 18, 2022): 46– 60. Accessed December 16, 2025. https://www.bjs-uniben.org/index.php/home/article/view/56.