http://reply.papertrans.cn/3/238/23754/23754-11.png
Submitted on: 10 June 2000.
Revised on: 21 July 2000.
Accepted on: 26 July 2000.
Opuscula Mathematica
Submitted on: 05 December 2008.
Revised on: 01 January 2009.
Accepted on: 25 January 2009.
Opuscula Mathematica---AGH UNIV SCIENCE & TECHNOLOGY PRESS
http://reply.papertrans.cn/3/238/23754/23754-14.png
Submitted on: 28 June 2023.
Revised on: 21 July 2023.
Accepted on: 28 July 2023.
Opuscula Mathematica
http://reply.papertrans.cn/3/238/23754/23754-16.png
Submitted on: 15 May 2004.
Revised on: 11 June 2004.
Accepted on: 24 June 2004.
Opuscula Mathematica
Submitted on: 04 March 2003.
Revised on: 16 April 2003.
Accepted on: 06 May 2003.
Opuscula Mathematica
Submitted on: 07 June 2004.
Revised on: 29 June 2004.
Accepted on: 13 July 2004.
Opuscula Mathematica---AGH UNIV SCIENCE & TECHNOLOGY PRESS
Submitted on: 15 January 2014.
Revised on: 23 February 2014.
Accepted on: 01 March 2014.
Opuscula Mathematica