| article html file updated | 5 February 2020 22:50 CET | Update | https://www.mdpi.com/2218-1989/2/4/844 |
| article html file updated | 8 May 2019 12:35 CEST | Update | N/A |
| article html file updated | 20 March 2019 14:39 CET | Update | N/A |
| article html file updated | 17 June 2015 03:47 CEST | Update | N/A |
| article html file updated | 7 January 2014 12:26 CET | Update | N/A |
| article xml file uploaded | 7 January 2014 12:26 CET | Update | https://www.mdpi.com/2218-1989/2/4/844/xml |
| article html file updated | 30 August 2013 09:15 CEST | Update | N/A |
| article xml file uploaded | 30 August 2013 09:15 CEST | Original file | N/A |
| article html file updated | 7 February 2013 16:33 CET | Update | N/A |
| article html file updated | 24 January 2013 07:46 CET | Original file | N/A |
