Kabir, M. H., Ruman, U. ., Alam, S., Islam, S. ., Sultana, J., & Islam, M. M. . (2022). Approximate Shortest Distance and Direction between two Places on the Spherical Earth and the Oblate Spherical Earth. GUB Journal of Science and Engineering, 8(1), 49–56. https://doi.org/10.3329/gubjse.v8i1.62332