Onah, C. E., S. C. Meludu, C. E. Dioka, N. K. Nnamah, J. K. Nnoli, U. K. Amah, C. M. Atuegbu, and C. P. Asuoha. “The Levels of Testosterone, Zinc, Manganese and Selenium in Type 2 Diabetic Patient in South-Eastern Nigeria”. International Journal of Research in Medical Sciences, vol. 3, no. 5, Jan. 2017, pp. 1138-41, https://www.msjonline.org/index.php/ijrms/article/view/1458.