Bhatti, M. A., K. R. Kazmi, M. S. Nizami, M. S. Anwar, and M. Habib. “Technology Beneficiation Studies on Low-Grade Stibnite Ore of Chitral, NWFP, Pakistan: Beneficiation Studies on Low-Grade Stibnite”. Biological Sciences - PJSIR, vol. 51, no. 1, Feb. 2008, pp. 45-51, http://www.biostaging.pjsir.org/index.php/biological-sciences/article/view/609.