Volume 34, Issue 6, November and December 2010, Pages 619-635
Volume 31, Issue 6, January and February 2007, Pages 593-602
Volume 31, Issue 6, January and February 2007, Pages 603-616
Volume 31, Issue 3, January and February 2007, Pages 303-315
Volume 30, Issue 2, January and February 2006, Pages 259-276
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