| article html file updated | 6 February 2020 12:18 CET | Update | https://www.mdpi.com/1996-1944/7/9/6686 |
| article html file updated | 7 May 2019 08:10 CEST | Update | - |
| article html file updated | 22 March 2019 01:03 CET | Update | - |
| article html file updated | 20 August 2015 19:50 CEST | Update | - |
| article html file updated | 21 October 2014 06:30 CEST | Original file | - |
| article xml file uploaded | 21 October 2014 06:30 CEST | Original file | https://www.mdpi.com/1996-1944/7/9/6686/xml |
| article pdf uploaded. | 18 September 2014 14:27 CEST | Version of Record | https://www.mdpi.com/1996-1944/7/9/6686/pdf |
