| article html file updated | 20 August 2015 01:41 CEST | Update | https://www.mdpi.com/1996-1944/7/4/2697 |
| article html file updated | 3 June 2014 14:45 CEST | Original file | - |
| article xml file uploaded | 3 June 2014 14:43 CEST | Original file | https://www.mdpi.com/1996-1944/7/4/2697/xml |
| article pdf uploaded. | 1 April 2014 11:18 CEST | Updated version of record | https://www.mdpi.com/1996-1944/7/4/2697/pdf |
| article pdf uploaded. | 31 March 2014 09:53 CEST | Version of Record | https://www.mdpi.com/1996-1944/7/4/2697/pdf-vor |
