Submitted on: 24 April 2013.
Revised on: 17 May 2013.
Accepted on: 13 June 2013.
RESEARCH IN ENGINEERING DESIGN
Submitted on: 05 April 1998.
Revised on: 23 April 1998.
Accepted on: 19 May 1998.
RESEARCH IN ENGINEERING DESIGN
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Submitted on: 30 June 2017.
Revised on: 17 July 2017.
Accepted on: 05 August 2017.
RESEARCH IN ENGINEERING DESIGN