| article html file updated | 5 February 2020 14:03 CET | Update | https://www.mdpi.com/1999-4915/2/4/880 |
| article html file updated | 5 February 2020 08:07 CET | Update | - |
| article html file updated | 9 May 2019 07:23 CEST | Update | - |
| article html file updated | 19 March 2019 23:19 CET | Update | - |
| article html file updated | 16 June 2015 08:59 CEST | Update | - |
| article html file updated | 14 August 2014 12:06 CEST | Update | - |
| article xml file uploaded | 14 August 2014 12:06 CEST | Original file | https://www.mdpi.com/1999-4915/2/4/880/xml |
| article html file updated | 6 February 2013 17:02 CET | Update | - |
| article html file updated | 5 February 2013 21:12 CET | Update | - |
| article html file updated | 28 January 2013 18:45 CET | Update | - |
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| article html file updated | 21 January 2013 22:14 CET | Update | - |
| article html file updated | 18 January 2013 04:19 CET | Original file | - |
