Zhang, Meiling
Lal, Rattan
Zhao, Youyi
Jiang, Wenlan
Chen, Quangong
Funding for this research was provided by:
National Natural Science Foundation of China (31160398, 31560563)
the Natural Science Foundation of Gansu Province, China (1606RJZA077, 1606RJZA073, 1308RJZA262)
the Research Fund of Higher Education of Gansu, China (2015A-074)