| article html file updated | 5 February 2020 21:00 CET | Update | https://www.mdpi.com/2075-1680/1/2/99 |
| article html file updated | 19 September 2019 11:32 CEST | Update | - |
| article html file updated | 8 May 2019 16:51 CEST | Update | - |
| article html file updated | 25 March 2019 12:27 CET | Update | - |
| article html file updated | 17 June 2015 00:48 CEST | Update | - |
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| article xml file uploaded | 17 March 2015 05:03 CET | Original file | https://www.mdpi.com/2075-1680/1/2/99/xml |
| article html file updated | 7 February 2013 13:18 CET | Update | - |
| article html file updated | 7 February 2013 03:09 CET | Update | - |
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| article html file updated | 29 January 2013 05:06 CET | Update | - |
| article html file updated | 26 January 2013 11:45 CET | Update | - |
| article html file updated | 23 January 2013 21:12 CET | Original file | - |
