| article html file updated | 6 February 2020 11:57 CET | Update | https://www.mdpi.com/1996-1944/7/9/6281 |
| article html file updated | 7 May 2019 08:48 CEST | Update | - |
| article html file updated | 22 March 2019 00:14 CET | Update | - |
| article html file updated | 20 August 2015 17:15 CEST | Update | - |
| article html file updated | 20 October 2014 11:39 CEST | Original file | - |
| article xml file uploaded | 20 October 2014 11:39 CEST | Original file | https://www.mdpi.com/1996-1944/7/9/6281/xml |
| article pdf uploaded. | 3 September 2014 08:09 CEST | Version of Record | https://www.mdpi.com/1996-1944/7/9/6281/pdf |
