Hamdy, A. E.-H. A., R. F. Allam, S. S. Mohamed, and A. E.-M. E.-. Refai. “?FACTORS AFFECTING CHROMIUM REMOVAL USING SACCHAROMYCES CEREVISIAE”. Biological Sciences - PJSIR, vol. 43, no. 2, Apr. 2000, pp. 99-105, https://v2.pjsir.org/index.php/biological-sciences/article/view/2003.