Wang, Chao http://orcid.org/0000-0002-6357-3661
Agarwal, Ravi P.
O’Regan, Donal
N’Guérékata, Gaston M.
Funding for this research was provided by:
Youth Fund of NSFC (11601470)
Tian Yuan Fund of NSFC (11526181)
Dong Lu youth excellent teachers development program of Yunnan University (wx069051)
Article History
Received: 26 June 2018
Accepted: 9 November 2018
First Online: 21 November 2018
Competing interests
: The authors declare that they have no competing interests.