| article html file updated | 5 February 2020 19:56 CET | Update | https://www.mdpi.com/2079-6412/2/2/64 |
| article html file updated | 8 May 2019 19:15 CEST | Update | N/A |
| article html file updated | 25 March 2019 10:16 CET | Update | N/A |
| article html file updated | 19 May 2016 09:28 CEST | Update | N/A |
| article html file updated | 16 June 2015 22:48 CEST | Update | N/A |
| article html file updated | 7 February 2013 11:24 CET | Update | N/A |
| article html file updated | 7 February 2013 01:27 CET | Update | N/A |
| article html file updated | 6 February 2013 06:52 CET | Update | N/A |
| article html file updated | 29 January 2013 02:31 CET | Update | N/A |
| article html file updated | 26 January 2013 09:17 CET | Update | N/A |
| article html file updated | 23 January 2013 13:53 CET | Original file | N/A |
| Correction published | 19 June 2012 00:00 CEST | Correction | http://www.mdpi.com/2079-6412/2/2/94 |
