Zhang, Xuanni
Funding for this research was provided by:
National natural science foundation for youth project (61307002)
National natural science foundation project (61271110)
Xianyang normal university top young talent project (XSYBJ201701)
Article History
Received: 12 November 2018
Revised: 25 January 2019
Accepted: 5 February 2019
First Online: 5 March 2019
Change Date: 7 November 2022
Change Type: Clarification
Change Details: This article was retracted on 7 November 2022.
Free to read: This content has been made available to all.