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Submitted on: 20 September 1998.
Revised on: 19 October 1998.
Accepted on: 08 November 1998.
___________________GRAPHICAL MODELS---ACADEMIC PRESS INC ELSEVIER SCIENCE
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Submitted on: 18 March 2016.
Revised on: 30 May 2016.
Accepted on: 19 July 2016.
___________________GRAPHICAL MODELS---ACADEMIC PRESS INC ELSEVIER SCIENCE
Submitted on: 25 April 2014.
Revised on: 22 July 2014.
Accepted on: 16 August 2014.
___________________GRAPHICAL MODELS---ACADEMIC PRESS INC ELSEVIER SCIENCE
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Submitted on: 19 April 1998.
Revised on: 28 July 1998.
Accepted on: 21 September 1998.
___________________GRAPHICAL MODELS---ACADEMIC PRESS INC ELSEVIER SCIENCE
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