Liu, Xiao
Qiu, Meikang
Wang, Xiaodeng
Liu, Weiran
Cai, Kaiquan
Funding for this research was provided by:
National Science Foundation (1457506)
Article History
Received: 1 October 2015
Revised: 13 December 2015
Accepted: 23 February 2016
First Online: 2 April 2016