| article html file updated | 5 February 2020 21:20 CET | Update | https://www.mdpi.com/2077-0375/2/3/510 |
| article html file updated | 8 May 2019 16:09 CEST | Update | - |
| article html file updated | 25 March 2019 13:04 CET | Update | - |
| article html file updated | 17 June 2015 01:18 CEST | Update | - |
| article html file updated | 5 March 2015 11:20 CET | Update | - |
| article xml file uploaded | 5 March 2015 11:20 CET | Update | https://www.mdpi.com/2077-0375/2/3/510/xml |
| article html file updated | 18 March 2014 09:50 CET | Update | - |
| article xml file uploaded | 18 March 2014 09:50 CET | Original file | - |
| article html file updated | 7 February 2013 13:50 CET | Update | - |
| article html file updated | 7 February 2013 04:40 CET | Update | - |
| article html file updated | 6 February 2013 09:13 CET | Update | - |
| article html file updated | 29 January 2013 05:34 CET | Update | - |
| article html file updated | 26 January 2013 16:43 CET | Update | - |
| article html file updated | 23 January 2013 22:48 CET | Original file | - |
