| article html file updated | 5 February 2020 15:51 CET | Update | https://www.mdpi.com/1660-3397/8/11/2781 |
| article html file updated | 9 May 2019 03:39 CEST | Update | - |
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| article xml file uploaded | 14 August 2014 12:06 CEST | Original file | https://www.mdpi.com/1660-3397/8/11/2781/xml |
| article html file updated | 6 February 2013 18:57 CET | Update | - |
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| article html file updated | 22 January 2013 06:02 CET | Original file | - |