- 2019 Citations – 208 KB
- 2018 Citations – 236 KB
- 2017 Citations – 133 KB
- 2016 Citations – 140 KB
- 2015 Citations – 134 KB
- 2014 Citations – 142 KB
- 2013 Citations – 193 KB
- 2012 Citations – 160 KB
- 2011 Citations – 181 KB
- 2010 Citations – 182 KB
- 2009 Citations – 139 KB
- 2008 Citations – 135 KB
- 2007 Citations – 146 KB
- 2006 Citations – 124 KB
- 2005 Citations – 118 KB
- 2004 Citations – 125 KB
- 2003 Citations – 113 KB
2001 Citation – 99 KB
- 1998 Citations – 111 KB
- 2019
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- 2019 Citations – 208 KB
- 2018
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- 2018 Citations – 236 KB
- 2017
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- 2017 Citations – 133 KB
- 2016
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- 2016 Citations – 140 KB
- 2015
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- 2015 Citations – 134 KB
- 2014
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- 2014 Citations – 142 KB
- 2013
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- 2013 Citations – 193 KB
- 2012
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- 2012 Citations – 160 KB
- 2011
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- 2011 Citations – 181 KB
- 2010
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- 2010 Citations – 182 KB
- 2009
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- 2009 Citations – 139 KB
- 2008
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- 2008 Citations – 135 KB
- 2007
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- 2007 Citations – 146 KB
- 2006
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- 2006 Citations – 124 KB
- 2005
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- 2005 Citations – 118 KB
- 2004
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- 2004 Citations – 125 KB
- 2003
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- 2003 Citations – 113 KB
- 2001
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2001 Citation – 99 KB
- 1998
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- 1998 Citations – 111 KB
