1. Redden, L.D., Groves, R.D. and Seidel, D.C., Metallurgical recovery of critical metals from hardface alloy grinding waste: A laboratory study. U.S. Bur. Mines Rep. Invest., 9210, 31 pp.
2. Process for recovering chromium and other metals from superalloy scrap;deBarbadillo;U.S. Bur. Mines Rep. Invest.,1981
3. Chemical reclaiming of superalloy scrap;Brooks;U.S. Bur. Mines Rep. Invest.,1969
4. Solvent extraction of cobalt and nickel by organophosphorus acids, I. Comparison of phosphoric, phosphonic and phosphinic acid systems;Preston;Hydrometallurgy,1982
5. Solvent extraction of base metals by mixtures of organophosphoric acids and non-chelating oximes;Preston;Hydrometallurgy,1983