| article html file updated | 16 June 2015 04:13 CEST | Update | https://www.mdpi.com/1424-8220/8/4/2604 |
| article html file updated | 6 June 2013 10:54 CEST | Original file | N/A |
| article xml file uploaded | 6 June 2013 10:54 CEST | Original file | https://www.mdpi.com/1424-8220/8/4/2604/xml |
