Wang, J; Jiang, C; Wei, Z; Pan, C; Zhang, H; Ren, Y; (2019) Joint UAV hovering altitude and power control for space-air-ground iot networks. IEEE Internet of Things Journal , 6 (2) pp. 1741-1753. 10.1109/JIOT.2018.2875493 <https://doi.org/10.1109/JIOT.2018.2875493>. Green open access