| article html file updated | 6 February 2020 12:28 CET | Update | https://www.mdpi.com/1996-1944/7/9/6879 |
| article html file updated | 7 May 2019 07:51 CEST | Update | - |
| article html file updated | 22 March 2019 01:31 CET | Update | - |
| article html file updated | 20 August 2015 20:55 CEST | Update | - |
| article html file updated | 20 October 2014 11:40 CEST | Original file | - |
| article xml file uploaded | 20 October 2014 11:40 CEST | Original file | https://www.mdpi.com/1996-1944/7/9/6879/xml |
| article pdf uploaded. | 25 September 2014 10:49 CEST | Version of Record | https://www.mdpi.com/1996-1944/7/9/6879/pdf |
