| article html file updated | 5 February 2020 19:03 CET | Update | https://www.mdpi.com/2227-7102/2/1/22 |
| article html file updated | 19 September 2019 07:42 CEST | Update | - |
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| article html file updated | 14 August 2014 11:41 CEST | Update | - |
| article xml file uploaded | 14 August 2014 11:41 CEST | Update | https://www.mdpi.com/2227-7102/2/1/22/xml |
| article html file updated | 14 August 2014 11:21 CEST | Update | - |
| article xml file uploaded | 14 August 2014 11:21 CEST | Original file | - |
| article html file updated | 7 February 2013 09:39 CET | Update | - |
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| article html file updated | 29 January 2013 01:14 CET | Update | - |
| article html file updated | 26 January 2013 07:22 CET | Update | - |
| article html file updated | 23 January 2013 07:11 CET | Original file | - |
