Mucsi, G., Rácz, Ádám, Mag, G., Antal, G. and Csőke, B. 2019. Volume based closed-cycle Hardgrove grindability method. Rudarsko-geološko-naftni zbornik. 34, 4 (Jun. 2019). DOI:https://doi.org/10.17794/rgn.2019.4.2.