Liu, Wei
Li, Xiliang
Funding for this research was provided by:
the Doctoral Scientific Research Foundation of Shandong Institute of Business and Technology (No. BS201703)
Article History
Received: 1 February 2018
Accepted: 11 March 2018
First Online: 27 March 2018
Compliance with ethical standards
:
: We declare that we have no conflict of interests.