Gao, Huadong
Sun, Pengtao
Funding for this research was provided by:
National Natural Science Foundation of China (11501227)
National Science Foundation (DMS-1418806)
Article History
Received: 10 December 2017
Revised: 26 April 2018
Accepted: 2 May 2018
First Online: 21 May 2018
Change Date: 21 June 2018
Change Type: Correction
Change Details: The original version of this article contained a mistake. There are error in line breaks in Eqs. 4.3 and 4.4 and the word “quad” was included inadvertently in Eq. 4.4.