| article html file updated | 6 February 2020 09:59 CET | Update | https://www.mdpi.com/1996-1944/7/6/4574 |
| article html file updated | 7 May 2019 13:03 CEST | Update | - |
| article html file updated | 21 March 2019 18:56 CET | Update | - |
| article html file updated | 20 August 2015 10:03 CEST | Update | - |
| article html file updated | 11 July 2014 11:00 CEST | Original file | - |
| article xml file uploaded | 11 July 2014 11:00 CEST | Original file | https://www.mdpi.com/1996-1944/7/6/4574/xml |
| article pdf uploaded. | 16 June 2014 16:21 CEST | Version of Record | https://www.mdpi.com/1996-1944/7/6/4574/pdf |
