| article html file updated | 5 February 2020 18:01 CET | Update | https://www.mdpi.com/2077-0375/1/3/249 |
| article html file updated | 8 May 2019 23:21 CEST | Update | - |
| article html file updated | 20 March 2019 09:19 CET | Update | - |
| article html file updated | 16 June 2015 18:03 CEST | Update | - |
| article html file updated | 14 August 2014 12:04 CEST | Update | - |
| article xml file uploaded | 14 August 2014 12:04 CEST | Update | https://www.mdpi.com/2077-0375/1/3/249/xml |
| article html file updated | 12 May 2014 15:42 CEST | Update | - |
| article xml file uploaded | 12 May 2014 15:41 CEST | Original file | - |
| article html file updated | 6 February 2013 22:26 CET | Update | - |
| article html file updated | 6 February 2013 02:12 CET | Update | - |
| article html file updated | 28 January 2013 23:35 CET | Update | - |
| article html file updated | 26 January 2013 04:42 CET | Update | - |
| article html file updated | 22 January 2013 21:20 CET | Original file | - |
