Apeh, Ojima Isaac, and Robert Tenzer. “Selection of an Optimum Global Gravitational Model for Geological Mapping of Afikpo and Anambra Basins in Nigeria”. Geodesy and Cartography 48, no. 2 (June 29, 2022): 92–106. Accessed December 23, 2024. https://transport.vilniustech.lt/index.php/GAC/article/view/14551.