| article html file updated | 5 February 2020 19:22 CET | Update | https://www.mdpi.com/2077-0375/2/1/40 |
| article html file updated | 8 May 2019 20:29 CEST | Update | - |
| article html file updated | 25 March 2019 09:14 CET | Update | - |
| article html file updated | 16 June 2015 21:35 CEST | Update | - |
| article html file updated | 28 April 2014 10:54 CEST | Update | - |
| article xml file uploaded | 28 April 2014 10:54 CEST | Update | https://www.mdpi.com/2077-0375/2/1/40/xml |
| article html file updated | 7 February 2013 10:19 CET | Update | - |
| article html file updated | 7 February 2013 00:36 CET | Update | - |
| article html file updated | 6 February 2013 05:55 CET | Update | - |
| article html file updated | 29 January 2013 01:38 CET | Update | - |
| article html file updated | 26 January 2013 08:00 CET | Update | - |
| article html file updated | 23 January 2013 09:28 CET | Update | - |
| article html file updated | 16 January 2013 13:13 CET | Original file | - |
| article xml file uploaded | 16 January 2013 13:13 CET | Original file | - |
