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Submitted on: 15 December 2007.
Revised on: 26 December 2007.
Accepted on: 02 January 2008.
RAMANUJAN JOURNAL
Submitted on: 01 June 1999.
Revised on: 17 June 1999.
Accepted on: 13 July 1999.
RAMANUJAN JOURNAL
Submitted on: 16 November 2017.
Revised on: 08 December 2017.
Accepted on: 03 January 2018.
RAMANUJAN JOURNAL---SPRINGER
Submitted on: 31 January 2009.
Revised on: 21 February 2009.
Accepted on: 28 February 2009.
RAMANUJAN JOURNAL
Submitted on: 11 August 2021.
Revised on: 28 August 2021.
Accepted on: 15 September 2021.
RAMANUJAN JOURNAL---SPRINGER