| article html file updated | 6 February 2020 22:14 CET | Update | https://www.mdpi.com/2071-1050/7/9/11998 |
| article html file updated | 6 May 2019 12:32 CEST | Update | - |
| article html file updated | 26 March 2019 09:38 CET | Update | - |
| article html file updated | 12 October 2015 12:32 CEST | Original file | - |
| article xml file uploaded | 12 October 2015 12:32 CEST | Original file | https://www.mdpi.com/2071-1050/7/9/11998/xml |
| article pdf uploaded. | 28 August 2015 11:49 CEST | Version of Record | https://www.mdpi.com/2071-1050/7/9/11998/pdf |
