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Submitted on: 05 June 2000.
Revised on: 21 September 2000.
Accepted on: 20 October 2000.
___________________JOURNAL OF MECHANICS---OXFORD UNIV PRESS
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Submitted on: 19 December 2001.
Revised on: 12 April 2002.
Accepted on: 12 May 2002.
___________________JOURNAL OF MECHANICS---OXFORD UNIV PRESS
Submitted on: 30 January 2020.
Revised on: 06 May 2020.
Accepted on: 04 June 2020.
___________________JOURNAL OF MECHANICS---OXFORD UNIV PRESS
Submitted on: 18 December 2021.
Revised on: 01 March 2022.
Accepted on: 16 April 2022.
___________________JOURNAL OF MECHANICS---OXFORD UNIV PRESS
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Submitted on: 10 November 2023.
Revised on: 07 December 2023.
Accepted on: 18 January 2024.
___________________JOURNAL OF MECHANICS---OXFORD UNIV PRESS
Submitted on: 30 April 1999.
Revised on: 14 August 1999.
Accepted on: 16 September 1999.
___________________JOURNAL OF MECHANICS---OXFORD UNIV PRESS