M. A. El-Damcese, Abdelfattah Mustafa, B. S. El-Desouky, and M. E. Mustafa. 2016. “The Kumaraswamy Flexible Weibull Extension”. International Journal of Mathematics And Its Applications 4 (1 - A):1-14. http://ijmaa.in/index.php/ijmaa/article/view/540.