Spatio-temporal variation of photosynthetically active radiation in China in recent 50 years
ZHU Xudong, HE Honglin, LIU Min, YU Guirui, SUN Xiaomin, GAO Yanhua
Journal of Geographical Sciences . 2010, (6): 803 -817 .  DOI: 10.1007/s11442-010-0812-7