Submitted on: 08 February 2007.
Revised on: 09 May 2007.
Accepted on: 20 June 2007.
___________________International Journal of Geomechanics
Submitted on: 26 July 1999.
Revised on: 16 August 1999.
Accepted on: 28 September 1999.
___________________International Journal of Geomechanics
Submitted on: 13 November 2012.
Revised on: 12 February 2013.
Accepted on: 03 April 2013.
___________________International Journal of Geomechanics
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Submitted on: 28 October 2015.
Revised on: 18 December 2015.
Accepted on: 18 January 2016.
___________________International Journal of Geomechanics