| article html file updated | 5 February 2020 18:12 CET | Update | https://www.mdpi.com/2077-1444/2/3/449 |
| article html file updated | 8 January 2020 14:41 CET | Update | - |
| article html file updated | 19 September 2019 06:06 CEST | Update | - |
| article html file updated | 8 May 2019 22:57 CEST | Update | - |
| article html file updated | 20 March 2019 09:48 CET | Update | - |
| article html file updated | 16 June 2015 18:33 CEST | Update | - |
| article html file updated | 14 August 2014 12:04 CEST | Update | - |
| article xml file uploaded | 14 August 2014 12:04 CEST | Original file | https://www.mdpi.com/2077-1444/2/3/449/xml |
| article html file updated | 6 February 2013 22:45 CET | Update | - |
| article html file updated | 6 February 2013 02:31 CET | Update | - |
| article html file updated | 28 January 2013 23:52 CET | Update | - |
| article html file updated | 26 January 2013 05:12 CET | Update | - |
| article html file updated | 22 January 2013 22:43 CET | Original file | - |
