Submitted on: 24 August 1999.
Revised on: 08 September 1999.
Accepted on: 13 September 1999.
Siberian Electronic Mathematical Reports-Sibirskie Elektronnye Matematicheskie Izvestiya
Submitted on: 03 December 2000.
Revised on: 05 January 2001.
Accepted on: 26 January 2001.
Siberian Electronic Mathematical Reports-Sibirskie Elektronnye Matematicheskie Izvestiya
Submitted on: 11 May 2022.
Revised on: 19 May 2022.
Accepted on: 28 May 2022.
Siberian Electronic Mathematical Reports-Sibirskie Elektronnye Matematicheskie Izvestiya
http://reply.papertrans.cn/3/280/27947/27947-24.png
http://reply.papertrans.cn/3/280/27947/27947-25.png
Submitted on: 03 November 2010.
Revised on: 17 December 2010.
Accepted on: 10 January 2011.
Siberian Electronic Mathematical Reports-Sibirskie Elektronnye Matematicheskie Izvestiya
Submitted on: 23 April 2015.
Revised on: 27 May 2015.
Accepted on: 11 June 2015.
Siberian Electronic Mathematical Reports-Sibirskie Elektronnye Matematicheskie Izvestiya
http://reply.papertrans.cn/3/280/27947/27947-28.png
http://reply.papertrans.cn/3/280/27947/27947-29.png
Submitted on: 23 December 2020.
Revised on: 28 January 2021.
Accepted on: 07 February 2021.
Siberian Electronic Mathematical Reports-Sibirskie Elektronnye Matematicheskie Izvestiya