| article html file updated | 5 February 2020 23:40 CET | Update | https://www.mdpi.com/2072-6651/5/1/9 |
| article html file updated | 8 May 2019 10:34 CEST | Update | - |
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| article xml file uploaded | 5 February 2013 12:15 CET | Original file | https://www.mdpi.com/2072-6651/5/1/9/xml |
| article html file updated | 24 January 2013 11:44 CET | Original file | - |
