| article html file updated | 5 February 2020 19:42 CET | Update | https://www.mdpi.com/2072-6694/4/1/281 |
| article html file updated | 8 May 2019 19:45 CEST | Update | - |
| article html file updated | 25 March 2019 09:52 CET | Update | - |
| article html file updated | 16 June 2015 22:17 CEST | Update | - |
| article html file updated | 7 February 2013 11:01 CET | Update | - |
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| article html file updated | 6 February 2013 06:30 CET | Update | - |
| article html file updated | 1 February 2013 09:31 CET | Update | - |
| article xml file uploaded | 1 February 2013 09:31 CET | Original file | https://www.mdpi.com/2072-6694/4/1/281/xml |
| article html file updated | 29 January 2013 02:09 CET | Update | - |
| article html file updated | 26 January 2013 08:44 CET | Update | - |
| article html file updated | 23 January 2013 12:19 CET | Original file | - |
