Volume 15, Issue 4, March 2005, Pages 60-71
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Volume 13, Issue 4, March 2003, Pages 30-53
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Volume 11, Issue 4, March 2001, Pages 114-123
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Volume 11, Issue 2, September 2000, Pages 111-125
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Volume 7, Issue 3, December 1996, Pages 36-42
M. Niknam