Zhang, Qian
Wang, Shengli
Nan, Zhongren
Li, Yepu
Zang, Fei
Funding for this research was provided by:
the Fundamental Research Funds for the Central Universities in Lanzhou University (lzujbky-2017-222)
the Fundamental Research Funds for the Central Universities in Lanzhou University (lzujbky-2017-sp31)
Gansu Natural Science Fund, China (1606RJZA106)
Article History
Received: 30 October 2017
Accepted: 28 February 2018
First Online: 15 March 2018