| article html file updated | 6 February 2020 09:45 CET | Update | https://www.mdpi.com/1996-1944/7/6/4321 |
| article html file updated | 7 May 2019 13:33 CEST | Update | N/A |
| article html file updated | 21 March 2019 18:16 CET | Update | N/A |
| article html file updated | 20 August 2015 09:09 CEST | Update | N/A |
| article html file updated | 11 July 2014 11:00 CEST | Original file | N/A |
| article xml file uploaded | 11 July 2014 11:00 CEST | Original file | https://www.mdpi.com/1996-1944/7/6/4321/xml |
| article pdf uploaded. | 5 June 2014 14:24 CEST | Version of Record | https://www.mdpi.com/1996-1944/7/6/4321/pdf |
