Submitted on: 08 June 2004.
Revised on: 09 August 2004.
Accepted on: 26 September 2004.
___________________Bulletin of the University of Karaganda-Physics
Submitted on: 14 May 2024.
Revised on: 06 July 2024.
Accepted on: 17 July 2024.
___________________Bulletin of the University of Karaganda-Physics
Submitted on: 13 June 2009.
Revised on: 09 October 2009.
Accepted on: 03 November 2009.
___________________Bulletin of the University of Karaganda-Physics
Submitted on: 22 June 2008.
Revised on: 07 August 2008.
Accepted on: 15 September 2008.
___________________Bulletin of the University of Karaganda-Physics
Submitted on: 22 September 2006.
Revised on: 08 January 2007.
Accepted on: 17 February 2007.
___________________Bulletin of the University of Karaganda-Physics
http://reply.papertrans.cn/1/44/4395/4395-26.png
Submitted on: 02 January 2004.
Revised on: 17 April 2004.
Accepted on: 14 May 2004.
___________________Bulletin of the University of Karaganda-Physics
http://reply.papertrans.cn/1/44/4395/4395-28.png
http://reply.papertrans.cn/1/44/4395/4395-29.png
Submitted on: 01 February 2003.
Revised on: 01 May 2003.
Accepted on: 29 June 2003.
___________________Bulletin of the University of Karaganda-Physics