| article html file updated | 5 February 2020 23:01 CET | Update | https://www.mdpi.com/2218-1989/2/4/1012 |
| article html file updated | 8 May 2019 12:07 CEST | Update | - |
| article html file updated | 20 March 2019 15:03 CET | Update | - |
| article html file updated | 17 June 2015 04:06 CEST | Update | - |
| article html file updated | 7 January 2014 12:27 CET | Update | - |
| article xml file uploaded | 7 January 2014 12:27 CET | Update | https://www.mdpi.com/2218-1989/2/4/1012/xml |
| article html file updated | 30 August 2013 09:16 CEST | Update | - |
| article xml file uploaded | 30 August 2013 09:16 CEST | Original file | - |
| article html file updated | 7 February 2013 16:48 CET | Update | - |
| article html file updated | 24 January 2013 08:53 CET | Original file | - |
