Riaz, M., A. R. Khan, M. Khan, K. Khan, and A. Jan. “SYNERGISTIC EFFECT BETWEEN THIOL COLLECTORS IN REACTION WITH SULPHIDE MINERALS”. Biological Sciences - PJSIR, vol. 44, no. 5, Oct. 2001, pp. 257-62, https://v2.pjsir.org/index.php/biological-sciences/article/view/1942.