Empirical models for estimating global solar radiation in Wuhan City, China Shaban G. Gouda, Zakia Hussein, Shuai Luo, Panpan Wang, Hongliang Cao and Qiaoxia Yuan Eur. Phys. J. Plus, 133 12 (2018) 517 Published online: 17 December 2018 DOI: 10.1140/epjp/i2018-12333-2