1. Direct precipitation of niobium and tantalum from alkaline solutions using calcium-bearing reagents;Deblonde;Hydrometallurgy,2016
2. Koko, F., 2013. Niobium and Tantalum beneficiation from tantalite ore. [Published Thesis]. University of the Free State, Bloemfontein.
3. Nete, M., 2013. Separation and purification of niobium and tantalum from synthetic and natural compounds. [Published Thesis]. University of the Free State, Bloemfontein.
4. Nete, M., 2009. Dissolution and analytical characterization of tantalite ore, niobium metal and other niobium compounds. [Published Dissertation]. University of the Free State, Bloemfontein.
5. Characterization of physico-chemical changes during the alkali roasting of niobium and tantalum oxides. Drying, Roasting and Calcining of Minerals;Sanchez-Segado;Miner. Met. Mater. Soc.,2015