| article html file updated | 16 June 2015 20:19 CEST | Update | https://www.mdpi.com/1424-8247/4/12/1551 |
| article html file updated | 18 June 2014 04:08 CEST | Update | - |
| article xml file uploaded | 18 June 2014 04:08 CEST | Original file | https://www.mdpi.com/1424-8247/4/12/1551/xml |
| article html file updated | 6 February 2013 23:43 CET | Update | - |
| article html file updated | 6 February 2013 04:37 CET | Update | - |
| article html file updated | 29 January 2013 00:47 CET | Update | - |
| article html file updated | 26 January 2013 06:36 CET | Update | - |
| article html file updated | 23 January 2013 03:40 CET | Original file | - |
