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Submitted on: 15 November 2003.
Revised on: 27 November 2003.
Accepted on: 13 December 2003.
Nature Energy
Submitted on: 01 March 1999.
Revised on: 27 March 1999.
Accepted on: 16 April 1999.
Nature Energy---NATURE PORTFOLIO
Submitted on: 19 December 2010.
Revised on: 15 January 2011.
Accepted on: 03 February 2011.
Nature Energy
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Submitted on: 01 June 2016.
Revised on: 12 July 2016.
Accepted on: 06 August 2016.
Nature Energy---NATURE PORTFOLIO
Submitted on: 23 September 2019.
Revised on: 29 October 2019.
Accepted on: 12 November 2019.
Nature Energy
Submitted on: 13 September 1998.
Revised on: 04 October 1998.
Accepted on: 26 October 1998.
Nature Energy---NATURE PORTFOLIO
Submitted on: 28 May 1999.
Revised on: 27 June 1999.
Accepted on: 21 July 1999.
Nature Energy---NATURE PORTFOLIO