| article html file updated | 16 June 2015 22:47 CEST | Update | https://www.mdpi.com/1424-8220/12/4/4311 |
| article html file updated | 14 August 2014 12:05 CEST | Update | - |
| article xml file uploaded | 14 August 2014 12:05 CEST | Original file | https://www.mdpi.com/1424-8220/12/4/4311/xml |
| article html file updated | 7 February 2013 11:23 CET | Update | - |
| article html file updated | 7 February 2013 01:27 CET | Update | - |
| article html file updated | 6 February 2013 06:52 CET | Update | - |
| article html file updated | 29 January 2013 02:31 CET | Update | - |
| article html file updated | 26 January 2013 09:17 CET | Update | - |
| article html file updated | 23 January 2013 13:51 CET | Original file | - |
