Dehong, D., L. Wuke, L. Hao, and L. Ling. “A Recognition Method of Mineral Shape Based on Extreme Learning Machine”. Journal of Mines, Metals and Fuels, vol. 66, no. 12, Oct. 2022, pp. 851-6, https://informaticsjournals.com/index.php/jmmf/article/view/31812.