| article html file updated | 5 February 2020 17:23 CET | Update | https://www.mdpi.com/1660-4601/8/6/2009 |
| article html file updated | 19 September 2019 04:32 CEST | Update | - |
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| article xml file uploaded | 14 August 2014 12:04 CEST | Update | https://www.mdpi.com/1660-4601/8/6/2009/xml |
| article html file updated | 14 August 2014 11:42 CEST | Update | - |
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| article html file updated | 6 February 2013 21:18 CET | Update | - |
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| article html file updated | 28 January 2013 22:34 CET | Update | - |
| article html file updated | 26 January 2013 02:52 CET | Update | - |
| article html file updated | 22 January 2013 16:56 CET | Original file | - |
