| article html file updated | 16 June 2015 16:45 CEST | Update | https://www.mdpi.com/1424-8247/4/6/848 |
| article html file updated | 13 June 2014 12:13 CEST | Update | - |
| article xml file uploaded | 13 June 2014 12:13 CEST | Original file | https://www.mdpi.com/1424-8247/4/6/848/xml |
| article html file updated | 6 February 2013 21:29 CET | Update | - |
| article html file updated | 6 February 2013 01:20 CET | Update | - |
| article html file updated | 28 January 2013 22:45 CET | Update | - |
| article html file updated | 26 January 2013 03:06 CET | Update | - |
| article html file updated | 22 January 2013 17:44 CET | Original file | - |
