| article html file updated | 6 February 2020 10:36 CET | Update | https://www.mdpi.com/1996-1073/7/7/4397 |
| article html file updated | 7 May 2019 11:51 CEST | Update | - |
| article html file updated | 21 March 2019 20:32 CET | Update | - |
| article html file updated | 20 August 2015 12:19 CEST | Update | - |
| article html file updated | 12 August 2014 09:01 CEST | Original file | - |
| article xml file uploaded | 12 August 2014 09:01 CEST | Original file | https://www.mdpi.com/1996-1073/7/7/4397/xml |
| article pdf uploaded. | 9 July 2014 16:02 CEST | Version of Record | https://www.mdpi.com/1996-1073/7/7/4397/pdf |
