| article html file updated | 16 June 2015 04:13 CEST | Update | https://www.mdpi.com/1424-8220/8/4/2509 |
| article html file updated | 5 July 2013 17:53 CEST | Update | - |
| article xml file uploaded | 5 July 2013 17:52 CEST | Update | https://www.mdpi.com/1424-8220/8/4/2509/xml |
| article html file updated | 6 June 2013 10:53 CEST | Original file | - |
| article xml file uploaded | 6 June 2013 10:53 CEST | Original file | - |
