Ratia, V., V. Heino, K. Valtonen, M. Vippola, A. Kemppainen, P. Siitonen, and V.-T. Kuokkala. “Effect of Abrasive Properties on the High-Stress Three-Body Abrasion of Steels and Hard Metals”. Tribologia - Finnish Journal of Tribology, vol. 32, no. 1, Jan. 2014, pp. 3-18, https://journal.fi/tribologia/article/view/69262.