| article html file updated | 16 June 2015 18:30 CEST | Update | https://www.mdpi.com/1424-8247/4/9/1216 |
| article html file updated | 17 June 2014 04:46 CEST | Update | - |
| article xml file uploaded | 17 June 2014 04:46 CEST | Original file | https://www.mdpi.com/1424-8247/4/9/1216/xml |
| article html file updated | 6 February 2013 22:44 CET | Update | - |
| article html file updated | 6 February 2013 02:30 CET | Update | - |
| article html file updated | 28 January 2013 23:51 CET | Update | - |
| article html file updated | 26 January 2013 05:10 CET | Update | - |
| article html file updated | 22 January 2013 22:36 CET | Original file | - |
