Valderrama, M., and L. Magne. “Effect of Lifter Design Upon Mill Power Consumption”. Revista de Metalurgia 32, no. 4 (August 30, 1996): 215–222. Accessed February 3, 2023. https://revistademetalurgia.revistas.csic.es/index.php/revistademetalurgia/article/view/903.