| article html file updated | 15 June 2018 10:20 CEST | Update | https://www.mdpi.com/2218-273X/2/1/23 |
| article html file updated | 16 June 2015 21:00 CEST | Update | - |
| article html file updated | 12 May 2014 15:28 CEST | Update | - |
| article xml file uploaded | 12 May 2014 15:28 CEST | Original file | https://www.mdpi.com/2218-273X/2/1/23/xml |
| article html file updated | 7 February 2013 09:39 CET | Update | - |
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| article html file updated | 26 January 2013 07:21 CET | Update | - |
| article html file updated | 23 January 2013 07:08 CET | Original file | - |
