| article html file updated | 16 June 2015 16:42 CEST | Update | https://www.mdpi.com/1424-8247/4/6/822 |
| 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/1424-8247/4/6/822/xml |
| article html file updated | 6 February 2013 21:27 CET | Update | - |
| article html file updated | 6 February 2013 01:18 CET | Update | - |
| article html file updated | 28 January 2013 22:43 CET | Update | - |
| article html file updated | 26 January 2013 03:04 CET | Update | - |
| article html file updated | 22 January 2013 17:36 CET | Original file | - |
