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Submitted on: 30 April 2013.
Revised on: 10 May 2013.
Accepted on: 30 May 2013.
Research in Mathematics
Submitted on: 18 August 2006.
Revised on: 14 September 2006.
Accepted on: 21 September 2006.
Research in Mathematics---TAYLOR & FRANCIS LTD
Submitted on: 24 October 2022.
Revised on: 13 November 2022.
Accepted on: 20 November 2022.
Research in Mathematics
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Submitted on: 26 April 2008.
Revised on: 09 June 2008.
Accepted on: 06 July 2008.
Research in Mathematics
Submitted on: 17 June 2023.
Revised on: 25 July 2023.
Accepted on: 04 August 2023.
Research in Mathematics---TAYLOR & FRANCIS LTD
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