http://reply.papertrans.cn/1/4/371/371-31.png
Submitted on: 25 August 2000.
Revised on: 13 November 2000.
Accepted on: 25 December 2000.
___________________ACTA MECHANICA---SPRINGER WIEN
http://reply.papertrans.cn/1/4/371/371-33.png
Submitted on: 05 September 2023.
Revised on: 30 November 2023.
Accepted on: 24 January 2024.
___________________ACTA MECHANICA---SPRINGER WIEN
http://reply.papertrans.cn/1/4/371/371-35.png
http://reply.papertrans.cn/1/4/371/371-36.png