BRIMICH, Ladislav, et al. “Active Subsurface Structures at Fayoum- Cairo District, Northern Western Desert, Egypt, As Deduced from Magnetic Data”. Contributions to Geophysics and Geodesy, vol. 41, no. 4, Dec. 2011, pp. 329-51, https://journals.savba.sk/index.php/cgg/article/view/5152.