| article html file updated | 8 February 2020 16:38 CET | Update | https://www.mdpi.com/1424-8220/17/9/2156 |
| article html file updated | 27 September 2019 06:05 CEST | Update | - |
| article html file updated | 3 May 2019 01:08 CEST | Update | - |
| article html file updated | 30 September 2017 15:12 CEST | Update | - |
| article html file updated | 20 September 2017 06:28 CEST | Original file | - |
| article xml uploaded. | 20 September 2017 06:27 CEST | Update | https://www.mdpi.com/1424-8220/17/9/2156/xml |
| article xml uploaded. | 20 September 2017 06:26 CEST | Original file | - |
| article pdf uploaded. | 20 September 2017 06:26 CEST | Version of Record | https://www.mdpi.com/1424-8220/17/9/2156/pdf |
