A Comparative Study of Energy Efficiency in Tumbling Mills with the Use of Relo Grinding Media. - Kolev, Nikolay; Bodurov, Petar; Genchev, Vassil; Simpson, Ben; Melero, Manuel G.; Menéndez-Aguado, Juan M.; Dobrzanski, Leszek Adam; De Lacalle, Luis Norberto López (Metals (2075-4701), 2021)