Safiya Yusuf, Habibatu Ahmed, and Ibrahim Hamza, “Improving Device-to-Device Communication in Hybrid Microwave and Millimeter Wave Cellular Networks using Fractional Frequency Reuse Technique”, AJSEDE, vol. 5, no. 5, Aug. 2024, Accessed: Nov. 07, 2025. [Online]. Available: https://africanscholarpub.com/ajsede/article/view/276