| article html file updated | 6 February 2020 12:25 CET | Update | https://www.mdpi.com/1996-1073/7/9/6172 |
| article html file updated | 7 May 2019 07:57 CEST | Update | - |
| article html file updated | 22 March 2019 01:23 CET | Update | - |
| article html file updated | 20 August 2015 20:34 CEST | Update | - |
| article html file updated | 22 October 2014 07:37 CEST | Original file | - |
| article xml file uploaded | 22 October 2014 07:37 CEST | Original file | https://www.mdpi.com/1996-1073/7/9/6172/xml |
| article pdf uploaded. | 23 September 2014 11:08 CEST | Version of Record | https://www.mdpi.com/1996-1073/7/9/6172/pdf |
