| article html file updated | 6 February 2020 10:48 CET | Update | https://www.mdpi.com/1996-1073/7/7/4571 |
| article html file updated | 7 May 2019 11:26 CEST | Update | N/A |
| article html file updated | 21 March 2019 21:09 CET | Update | N/A |
| article html file updated | 20 August 2015 13:03 CEST | Update | N/A |
| article html file updated | 12 August 2014 09:02 CEST | Original file | N/A |
| article xml file uploaded | 12 August 2014 09:02 CEST | Original file | https://www.mdpi.com/1996-1073/7/7/4571/xml |
| article pdf uploaded. | 18 July 2014 09:50 CEST | Version of Record | https://www.mdpi.com/1996-1073/7/7/4571/pdf |
