| article html file updated | 6 February 2020 10:44 CET | Update | https://www.mdpi.com/1996-1073/7/7/4519 |
| article html file updated | 7 May 2019 11:35 CEST | Update | - |
| article html file updated | 21 March 2019 20:56 CET | Update | - |
| article html file updated | 20 August 2015 12:50 CEST | Update | - |
| article html file updated | 12 August 2014 09:02 CEST | Original file | - |
| article xml file uploaded | 12 August 2014 09:02 CEST | Original file | https://www.mdpi.com/1996-1073/7/7/4519/xml |
| article pdf uploaded. | 15 July 2014 14:40 CEST | Version of Record | https://www.mdpi.com/1996-1073/7/7/4519/pdf |
