| article html file updated | 20 August 2015 04:34 CEST | Update | https://www.mdpi.com/1996-1073/7/4/2720 |
| article html file updated | 16 June 2014 09:20 CEST | Original file | - |
| article xml file uploaded | 16 June 2014 09:20 CEST | Original file | https://www.mdpi.com/1996-1073/7/4/2720/xml |
| article pdf uploaded. | 24 April 2014 12:14 CEST | Version of Record | https://www.mdpi.com/1996-1073/7/4/2720/pdf |
