| article html file updated | 6 February 2020 10:11 CET | Update | https://www.mdpi.com/1996-1073/7/6/4002 |
| article html file updated | 7 May 2019 12:39 CEST | Update | - |
| article html file updated | 21 March 2019 19:30 CET | Update | - |
| article html file updated | 20 August 2015 10:45 CEST | Update | - |
| article html file updated | 11 July 2014 09:20 CEST | Original file | - |
| article xml file uploaded | 11 July 2014 09:20 CEST | Original file | https://www.mdpi.com/1996-1073/7/6/4002/xml |
| article pdf uploaded. | 24 June 2014 09:27 CEST | Version of Record | https://www.mdpi.com/1996-1073/7/6/4002/pdf |
