| article html file updated | 20 August 2015 03:36 CEST | Update | https://www.mdpi.com/1996-1073/7/4/2421 |
| article html file updated | 16 June 2014 09:15 CEST | Original file | N/A |
| article xml file uploaded | 16 June 2014 09:14 CEST | Original file | https://www.mdpi.com/1996-1073/7/4/2421/xml |
| article pdf uploaded. | 17 April 2014 10:26 CEST | Version of Record | https://www.mdpi.com/1996-1073/7/4/2421/pdf |
