Submitted on: 15 May 2017.
Revised on: 06 July 2017.
Accepted on: 26 August 2017.
___________________Communications in Applied and Industrial Mathematics
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Submitted on: 06 September 2011.
Revised on: 08 November 2011.
Accepted on: 06 January 2012.
___________________Communications in Applied and Industrial Mathematics
Submitted on: 01 August 2015.
Revised on: 13 November 2015.
Accepted on: 02 January 2016.
___________________Communications in Applied and Industrial Mathematics
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