| article html file updated | 5 February 2020 17:19 CET | Update | https://www.mdpi.com/1660-3397/9/6/922 |
| article html file updated | 9 May 2019 00:45 CEST | Update | - |
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| article xml file uploaded | 14 August 2014 12:07 CEST | Update | https://www.mdpi.com/1660-3397/9/6/922/xml |
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| article html file updated | 22 January 2013 16:28 CET | Original file | - |