Li, Gang
Xing, Yulong
Funding for this research was provided by:
National Science Foundation (DMS-1216454)
Oak Ridge National Laboratory
National Natural Science Foundation of China (11201254)
National Natural Science Foundation of China (11401332)
Project for Scientific Plan of Higher Education in Shandong Providence of P.R. China (J12LI08)
Article History
Received: 20 April 2015
Revised: 21 July 2015
Accepted: 24 August 2015
First Online: 3 September 2015