Khan, Muhammad Umer
Li, Shuai
Wang, Qixin
Shao, Zili
Funding for this research was provided by:
Research Grants Council, University Grants Committee, Hong Kong (HK) (152138/14E,5328/12E, 5245/09E)
DAAD/RGC Joint Research Scheme (G-HK022/12)
National Natural Science Foundation of China (CN) (61272103,61373049, 61401385)
Hong Kong Polytechnic University (HK) (2013AA013202)