| article html file updated | 6 February 2020 12:14 CET | Update | https://www.mdpi.com/1996-1944/7/9/6646 |
| article html file updated | 7 May 2019 08:18 CEST | Update | - |
| article html file updated | 22 March 2019 00:53 CET | Update | - |
| article html file updated | 20 August 2015 19:08 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/1996-1944/7/9/6646/xml |
| article pdf uploaded. | 16 September 2014 09:46 CEST | Version of Record | https://www.mdpi.com/1996-1944/7/9/6646/pdf |
