| article html file updated | 19 August 2015 19:16 CEST | Update | https://www.mdpi.com/1996-1944/7/2/906 |
| article html file updated | 3 June 2014 14:03 CEST | Original file | - |
| article xml file uploaded | 3 June 2014 14:01 CEST | Original file | https://www.mdpi.com/1996-1944/7/2/906/xml |
| article pdf uploaded. | 28 January 2014 13:51 CET | Version of Record | https://www.mdpi.com/1996-1944/7/2/906/pdf |
