A. A. . Hussein and F. H. . Mahmood, “Determination local geoid Heights Using RTK-DGPS/Leveling and transformation methods”, Iraqi Journal of Science, vol. 57, no. 2C, pp. 1604–1611, Jun. 2022, Accessed: Dec. 07, 2025. [Online]. Available: https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/7237