Nzali, A. H., M. J. Mwandosya, and M. L. Luhanga. 2018. “A DERIVATION OF A NOVEL EXPRESSION FOR THE INSTANTANEOUS EARTH-SUN DISTANCEUSING KEPLER`S LAWS AND SOME GEOMETRICAL RELATIONSHIPS”. Tanzania Journal of Engineering and Technology 21 (3). https://journals.udsm.ac.tz/index.php/tjet/article/view/2077.