| article html file updated | 19 August 2015 18:32 CEST | Update | https://www.mdpi.com/1996-1073/7/2/520 |
| article html file updated | 3 June 2014 12:03 CEST | Original file | N/A |
| article xml file uploaded | 3 June 2014 12:03 CEST | Original file | https://www.mdpi.com/1996-1073/7/2/520/xml |
| article pdf uploaded. | 23 January 2014 14:33 CET | Version of Record | https://www.mdpi.com/1996-1073/7/2/520/pdf |
