| article html file updated | 8 February 2020 19:45 CET | Update | https://www.mdpi.com/2071-1050/9/11/1970 |
| article html file updated | 28 September 2019 02:07 CEST | Update | - |
| article html file updated | 2 May 2019 18:18 CEST | Update | - |
| article html file updated | 30 November 2017 12:16 CET | Update | - |
| article html file updated | 28 October 2017 12:41 CEST | Original file | - |
| article xml uploaded. | 28 October 2017 12:40 CEST | Original file | https://www.mdpi.com/2071-1050/9/11/1970/xml |
| article pdf uploaded. | 28 October 2017 12:40 CEST | Version of Record | https://www.mdpi.com/2071-1050/9/11/1970/pdf |
