| article html file updated | 5 February 2020 21:10 CET | Update | https://www.mdpi.com/2218-1989/2/3/458 |
| article html file updated | 8 May 2019 16:31 CEST | Update | - |
| article html file updated | 25 March 2019 12:45 CET | Update | - |
| article html file updated | 17 June 2015 01:01 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/2218-1989/2/3/458/xml |
| article html file updated | 30 August 2013 09:14 CEST | Update | - |
| article xml file uploaded | 30 August 2013 09:14 CEST | Original file | - |
| article html file updated | 7 February 2013 13:32 CET | Update | - |
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| article html file updated | 29 January 2013 05:18 CET | Update | - |
| article html file updated | 26 January 2013 12:02 CET | Update | - |
| article html file updated | 23 January 2013 21:54 CET | Original file | - |
