3[6]Arunachalam V S and Fleischer E L. Materials Challenges for the Next Century. MRS Bulletin, Warrendale PA 15086 - 7573 USA,2001. 8～ 12
4[7]Nowak Z, "Recovery of Minerals and Elements from Ash". In Coal Ash Utilization: Fly Ash, Bottom Ash and Slag. edited by S. Torrey. Noyes Data Corp., Park Ridge, NJ, USA, 1978,10～18
5[8]Roy M, Murtha J, and Burnet G, Industrial Application of Magnetic Separation. IEEE Press, Piscataway, NJ, USA, 1979. 21～ 27
9[2]QinLi Zhang.Resource Assessment of Chinese copper Deposit and suggestions for Exploration[D].Department of Geosystem Engineering Graduate School of Engineering The University of Tokyo.Doctorate Dissertation.2004.46-62.
