Submitted on: 04 October 2010.
Revised on: 08 December 2010.
Accepted on: 08 January 2011.
___________________Cognition Technology & Work---SPRINGER LONDON LTD
Submitted on: 03 January 2000.
Revised on: 22 March 2000.
Accepted on: 15 April 2000.
___________________Cognition Technology & Work---SPRINGER LONDON LTD
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Submitted on: 20 May 2011.
Revised on: 14 August 2011.
Accepted on: 08 September 2011.
___________________Cognition Technology & Work---SPRINGER LONDON LTD
Submitted on: 10 March 2004.
Revised on: 05 June 2004.
Accepted on: 29 June 2004.
___________________Cognition Technology & Work---SPRINGER LONDON LTD
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Submitted on: 18 September 2005.
Revised on: 10 November 2005.
Accepted on: 10 December 2005.
___________________Cognition Technology & Work---SPRINGER LONDON LTD
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