Song, Lunji
Liu, Kaifang
Zhao, Shan
Funding for this research was provided by:
National Science Foundation (DMS-1318898)
National Natural Science Foundation of Gansu Province in China (145RJZA046)
Special Program for Applied Research on Super Computation of the NSFC-Guangdong Joint Fund
Article History
Received: 2 April 2016
Revised: 9 August 2016
Accepted: 16 September 2016
First Online: 27 September 2016