| article html file updated | 5 February 2020 23:53 CET | Update | https://www.mdpi.com/2076-3425/3/1/39 |
| article html file updated | 19 September 2019 16:50 CEST | Update | - |
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| article html file updated | 20 May 2014 08:34 CEST | Update | - |
| article xml file uploaded | 20 May 2014 08:34 CEST | Original file | https://www.mdpi.com/2076-3425/3/1/39/xml |
| article html file updated | 8 February 2013 09:26 CET | Update | - |
| article html file updated | 7 February 2013 17:45 CET | Update | - |
| article html file updated | 24 January 2013 12:04 CET | Original file | - |
