| article html file updated | 16 June 2015 13:53 CEST | Update | https://www.mdpi.com/1424-8247/4/2/215 |
| article html file updated | 12 June 2014 12:29 CEST | Update | - |
| article xml file uploaded | 12 June 2014 12:29 CEST | Original file | https://www.mdpi.com/1424-8247/4/2/215/xml |
| article html file updated | 6 February 2013 19:41 CET | Update | - |
| article html file updated | 5 February 2013 23:35 CET | Update | - |
| article html file updated | 28 January 2013 21:06 CET | Update | - |
| article html file updated | 26 January 2013 00:49 CET | Update | - |
| article html file updated | 22 January 2013 09:27 CET | Original file | - |
