O. F. Oduyebo, M. N. Ono, and S. O. Eteje, “FITTING OF A TRANSFORMATION GEOID MODEL TO THE GRAVIMETRIC-GEOMETRIC GEOID MODEL OF BENIN CITY”, FJS, vol. 5, no. 4, pp. 56–62, Jan. 2022, doi: 10.33003/fjs-2021-0504-781.