Kayode, K., Ifeanyi, A. and Dung, J. J. (2021) “Effect of Tantalum on Coltan in Cassiterite Using Mathematical Modeling Approach with Respect to Gibbs Energy”, The International Journal of Science & Technoledge, 9(6). doi: 10.24940/theijst/2021/v9/i6/ST2106-001.