Jiang, Xue
Li, Peijun
Lv, Junliang
Zheng, Weiying
Funding for this research was provided by:
Division of Mathematical Sciences (1151308)
National Science Foundation of China (11401040)
National Science Foundation of China (11126040)
National Science Foundation of China (11301214)
National Science Foundation of China (11171334)
National Science Foundation of China (91430215)
Article History
Received: 2 March 2016
Revised: 22 December 2016
Accepted: 3 February 2017
First Online: 10 February 2017