Okorie, I. E., A. C. Akpanta, and J. Ohakwe. 2017. “A Note on a Comparison of Methods for the Estimation of Weibull Distribution Parameters of Nwobi and Ugomma”. Journal of Progressive Research in Mathematics 11 (1), 1551-53. http://scitecresearch.com/journals/index.php/jprm/article/view/993.