| article html file updated | 6 February 2020 11:10 CET | Update | https://www.mdpi.com/1996-1073/7/8/4972 |
| article html file updated | 7 May 2019 10:37 CEST | Update | - |
| article html file updated | 21 March 2019 22:14 CET | Update | - |
| article html file updated | 20 August 2015 14:19 CEST | Update | - |
| article html file updated | 5 September 2014 10:32 CEST | Original file | - |
| article xml file uploaded | 5 September 2014 10:32 CEST | Original file | https://www.mdpi.com/1996-1073/7/8/4972/xml |
| article pdf uploaded. | 4 August 2014 09:38 CEST | Version of Record | https://www.mdpi.com/1996-1073/7/8/4972/pdf |
