J. O. Odumosu, E. A. Adesina, V. C. Nnam, and G. O. Nwodo, “PRACTICAL OPTIONS FOR THE RE-DEFINITION OF THE NIGERIAN VERTICAL REFERENCE SYSTEM: A CASE STUDY OF LAGOS STATE”, Int. J. Renew. Energ & Environ, vol. 4, no. 2, pp. 45–60, May 2026, doi: 10.5281/zenodo.20191896.