El-Kammar A. M. and Osman H. M.: Effect of oxygenated pore-water on Ankur iron ore, NE Sud. In: Acta mineralogica-petrographica, (25) 1. pp. 109-116. (1981)
El-Kammar A. M. and Shaalan M. B. and Osman H. M.: Geochemistry of Ankur iron ore deposits, NE Sudan. In: Acta mineralogica-petrographica, (25) 1. pp. 117-126. (1981)