1. O. Hyvärinen, R. Rosenberg, L. Lindroos and E. Yllö, “ Selenium and Precious Metals Recovery from Copper Anode Slimes at Outokumpu Refinery,” presented at 113th AIME Annual Meeting, Los Angeles, CA, 1984.
2. Selenium, ed. R.A. Zingaro and W.C. Cooper (New York: Van Nostrand Reinhold Company, 1974).