| article html file updated | 5 February 2020 21:25 CET | Update | https://www.mdpi.com/2071-1050/4/8/1669 |
| article html file updated | 8 May 2019 15:59 CEST | Update | - |
| article html file updated | 25 March 2019 13:14 CET | Update | - |
| article html file updated | 17 June 2015 01:27 CEST | Update | - |
| article html file updated | 7 February 2013 14:02 CET | Update | - |
| article html file updated | 7 February 2013 05:07 CET | Update | - |
| article html file updated | 6 February 2013 09:23 CET | Update | - |
| article html file updated | 29 January 2013 05:43 CET | Update | - |
| article html file updated | 26 January 2013 19:48 CET | Update | - |
| article html file updated | 23 January 2013 23:16 CET | Original file | - |
| Correction published | 13 September 2012 00:00 CEST | Correction | http://www.mdpi.com/2071-1050/4/9/2209 |
