Submitted on: 15 September 2019.
Revised on: 26 September 2019.
Accepted on: 12 October 2019.
Recent Contributions to Physics
http://reply.papertrans.cn/3/262/26158/26158-22.png
Submitted on: 06 August 2019.
Revised on: 04 September 2019.
Accepted on: 14 September 2019.
Recent Contributions to Physics
http://reply.papertrans.cn/3/262/26158/26158-24.png
Submitted on: 08 June 2017.
Revised on: 20 June 2017.
Accepted on: 06 July 2017.
Recent Contributions to Physics
http://reply.papertrans.cn/3/262/26158/26158-26.png
Submitted on: 05 September 2002.
Revised on: 09 October 2002.
Accepted on: 31 October 2002.
Recent Contributions to Physics
http://reply.papertrans.cn/3/262/26158/26158-28.png
http://reply.papertrans.cn/3/262/26158/26158-29.png
http://reply.papertrans.cn/3/262/26158/26158-30.png