| article html file updated | 5 February 2020 15:00 CET | Update | https://www.mdpi.com/2071-1050/2/7/2117 |
| article html file updated | 9 May 2019 05:21 CEST | Update | - |
| article html file updated | 20 March 2019 01:45 CET | Update | - |
| article html file updated | 20 July 2017 07:51 CEST | Update | - |
| article html file updated | 20 July 2017 07:50 CEST | Update | - |
| article html file updated | 20 July 2017 07:49 CEST | Original file | - |
| article xml uploaded. | 20 July 2017 07:48 CEST | Original file | https://www.mdpi.com/2071-1050/2/7/2117/xml |
