[1] Barbara Elvers, Stephen Hawkins, "Ulmanns Encyclopedia of Industrial Chemistry", Vol. A12 (1989).
[2] Kirk- Othmer, "Encyclopedia of Chemical Technology", Vol. 11 (1998).
[3] Lee, M.S., Lee, E.C., Solvent Extraction Separation of Indium and Gallium from Sulphate Solutions Using D2EHPA, Hydrometallurgy, 63, p. 269 (2002).
[4] David L. Gefvert, Dioxime Kinetic Enhancer for Solvent Extraction of Gallium from Basic Aqueous Solutions Thereof, U.S.A Patents, No. 4855114 (1989).
[5] Nicholas P. Wynn, Method of Liquid-Liquid Extraction of Gallium from a Basic Aqueous Solution, US Patents, No. 4587111 (1986).
[6] Yvette Pescher, Recovery of Gallium Values from Basic Aqueous Aolutions Thereof, U.S.A patents, No.5204074 (1993).
[7] Puvvada, G.V.K., Liquid-Liquid Extraction of Gallium from Bayer Process Liquor Using Kelex100 in the Presence of Surfactants, Hydrometallurgy, 52 (1998).
[8] Puvvada, G.V.K., Chandrasekher, K., Solvent Extraction of Gallium from an Indian Bayer Process Liquor Using Kelex100, Minerals Engineering, 9 (1996).