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, 11126040)
National Science Foundation of China (11301214, 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