Abdelrahman, E. M., A. I. Bayoumi, Y. E. Abdelhady, M. M. Gobashy, and H. M. El-Araby,  "Gravity interpretation using correlation factors between successive least-squares residual anomalies",  Geophysics, vol. 54, no. 12: Society of Exploration Geophysicists, pp. 1614?1621, 1989.