| article html file updated | 5 February 2020 21:03 CET | Update | https://www.mdpi.com/2218-1989/2/3/398 |
| article html file updated | 8 May 2019 16:45 CEST | Update | - |
| article html file updated | 25 March 2019 12:33 CET | Update | - |
| article html file updated | 17 June 2015 00:52 CEST | Update | - |
| article html file updated | 7 January 2014 12:24 CET | Update | - |
| article xml file uploaded | 7 January 2014 12:24 CET | Update | https://www.mdpi.com/2218-1989/2/3/398/xml |
| article html file updated | 30 August 2013 09:13 CEST | Update | - |
| article xml file uploaded | 30 August 2013 09:13 CEST | Original file | - |
| article html file updated | 7 February 2013 13:23 CET | Update | - |
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| article html file updated | 29 January 2013 05:10 CET | Update | - |
| article html file updated | 26 January 2013 11:51 CET | Update | - |
| article html file updated | 23 January 2013 21:25 CET | Original file | - |
