1. Comparative Geochemistry of Shell Phosphorites and Dictyonema Shales of the Baltic;Baturin;Geochem. Int.,2013
2. Bumb, B.L, Teboh, J.F, J.K Atta, J.K, and Asenso-Okyere, W.K, 1994. Ghana: Policy environment and fertilizer sector development, International Fertilizer Development Center (IFDC), Muscle Shoals, Alabama and the Ghana Institute of Statistical, Social and Economic Research.
3. de Ridder, M, de Jong, S, Polchar, J, and Lingemann, S, 2012. Risks and Opportunities in the Phosphate Industry, Robust Strategies in Times of Uncertainty, The Hague Centre for Strategic Studies (HCSS), The Netherlands, 2012.
4. Review of the main factors affecting the flotation of phosphate ores;Derhy;Minerals,2020
5. Beneficiation technology of phosphates: challenges and solutions;EI-Shall;Miner. Metall. Process.,2004