| article html file updated | 5 February 2020 13:09 CET | Update | https://www.mdpi.com/2072-6643/1/2/263 |
| article html file updated | 9 May 2019 09:16 CEST | Update | - |
| article html file updated | 19 March 2019 21:07 CET | Update | - |
| article html file updated | 16 June 2015 07:41 CEST | Update | - |
| article html file updated | 6 February 2013 16:10 CET | Update | - |
| article html file updated | 5 February 2013 20:19 CET | Update | - |
| article html file updated | 28 January 2013 17:56 CET | Update | - |
| article html file updated | 25 January 2013 20:28 CET | Update | - |
| article html file updated | 21 January 2013 18:39 CET | Update | - |
| article html file updated | 18 January 2013 00:50 CET | Original file | - |
| Correction published | 8 March 2010 00:00 CET | Correction | http://www.mdpi.com/2072-6643/2/3/317 |
