I. A. EL-HEMALY, M. A. ABD ALLA, I. TÚNYI, and O. ORLICKÝ, “Preliminary study of magnetic properties and magnetic mineralogy of the limestone samples from Egyptian Pyramids and Giza Pyramids Plateau”, Contrib. Geophys. Geod., vol. 41, no. 2, pp. 179-190, Jun. 2011.