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Exceptionally difficult

 

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Online download statistics by month: November 2011 to March 2024

AbstractFullPdf
Nov 2011263200103
Dec 20111282548
Jan 2012116816
Feb 20126527
Mar 20122733
Apr 20123534
May 20123300
Jun 20122810
Jul 20123510
Aug 20121201
Sep 20123310
Oct 20122300
Nov 2012011
Jan 2013010
Feb 2013011
Apr 2013010
May 2013020
Jun 2013800
Jul 2013100
Aug 2013200
Oct 2013350
Nov 20132140
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May 2014201
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Nov 20141300
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Jul 20151500
Aug 2015901
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Oct 2015100
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Dec 20151700
Jan 2016200
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Mar 2016100
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Jul 2016001
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Mar 2017100
Apr 2017310
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Aug 20171300
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Oct 20172300
Nov 2017900
Dec 20171000
Jan 20183800
Feb 2018400
Mar 20181510
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Jul 20181810
Aug 2018700
Sep 20181210
Oct 20181500
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Apr 2020800
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Jun 2020600
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Apr 2023600
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Jul 2023510
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Jan 2024600
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Total2079290189