9Nava - Alonso F, Elorza - Rodriguez E, Uribe - Salas A, et al. Pre- treatment with ozone for gold and silver recovery from refractory ores [J]. Ozone:Science & Engineering,2007,29(2) :101 -105.
10Nanthakumar B, Pickles C A, Kelebek S. Microwave pretreatment of a double refractory gold ore [ J ]. Minerals Engineering, 2007,20 (11):1 109-1 119.