Koizhanova A., Magomedov D., Kamalov E., Erdenova M. and Abdyldaev N. “Research of Bacterial-Chemical Leaching of Gold from Technogen Tails of Flotation”. International Journal of Advanced Science and Technology, Vol. 29, no. 06, Apr. 2020, pp. 4047 -53, http://sersc.org/journals/index.php/IJAST/article/view/15768.