http://reply.papertrans.cn/3/291/29098/29098-21.png
http://reply.papertrans.cn/3/291/29098/29098-22.png
http://reply.papertrans.cn/3/291/29098/29098-23.png
Submitted on: 18 July 2017.
Revised on: 28 August 2017.
Accepted on: 15 September 2017.
Symmetry Integrability and Geometry-Methods and Applications
http://reply.papertrans.cn/3/291/29098/29098-25.png
http://reply.papertrans.cn/3/291/29098/29098-26.png
Submitted on: 28 December 2020.
Revised on: 27 January 2021.
Accepted on: 12 February 2021.
Symmetry Integrability and Geometry-Methods and Applications
http://reply.papertrans.cn/3/291/29098/29098-28.png
http://reply.papertrans.cn/3/291/29098/29098-29.png
Submitted on: 20 February 2010.
Revised on: 18 March 2010.
Accepted on: 07 April 2010.
Symmetry Integrability and Geometry-Methods and Applications