| article html file updated | 5 February 2020 22:02 CET | Update | https://www.mdpi.com/2076-3425/2/3/421 |
| article html file updated | 8 May 2019 14:38 CEST | Update | - |
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| article html file updated | 17 June 2015 02:25 CEST | Update | - |
| article html file updated | 20 May 2014 08:32 CEST | Update | - |
| article xml file uploaded | 20 May 2014 08:32 CEST | Original file | https://www.mdpi.com/2076-3425/2/3/421/xml |
| article html file updated | 7 February 2013 15:07 CET | Update | - |
| article html file updated | 7 February 2013 06:18 CET | Update | - |
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| article html file updated | 29 January 2013 06:42 CET | Update | - |
| article html file updated | 24 January 2013 02:24 CET | Original file | - |
