| article html file updated | 6 February 2020 10:09 CET | Update | https://www.mdpi.com/1996-1073/7/6/3922 |
| article html file updated | 7 May 2019 12:43 CEST | Update | - |
| article html file updated | 21 March 2019 19:24 CET | Update | - |
| article html file updated | 20 August 2015 10:37 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/1996-1073/7/6/3922/xml |
| article pdf uploaded. | 23 June 2014 10:28 CEST | Version of Record | https://www.mdpi.com/1996-1073/7/6/3922/pdf |
