| article html file updated | 5 February 2020 22:14 CET | Update | https://www.mdpi.com/2218-1989/2/4/667 |
| article html file updated | 8 May 2019 14:12 CEST | Update | N/A |
| article html file updated | 20 March 2019 13:10 CET | Update | N/A |
| article html file updated | 17 June 2015 02:45 CEST | Update | N/A |
| article html file updated | 7 January 2014 12:25 CET | Update | N/A |
| article xml file uploaded | 7 January 2014 12:25 CET | Update | https://www.mdpi.com/2218-1989/2/4/667/xml |
| article html file updated | 30 August 2013 09:14 CEST | Update | N/A |
| article xml file uploaded | 30 August 2013 09:14 CEST | Original file | N/A |
| article html file updated | 7 February 2013 15:29 CET | Update | N/A |
| article html file updated | 24 January 2013 03:47 CET | Original file | N/A |
