Mfonobong C. Uko, Ubong S. Ukommi, Sunday C. Ekpo, and Rupak Kharel. “Area Spectral Efficiency of a Macro-Femto Heterogeneous Network for Cell-Edge Users under Shadowing and Fading Effects”. The Applied Computational Electromagnetics Society Journal (ACES), vol. 31, no. 09, Aug. 2021, pp. 1043-7, https://journals.riverpublishers.com/index.php/ACES/article/view/9903.