| article html file updated | 8 February 2020 14:50 CET | Update | https://www.mdpi.com/1424-8220/17/9/1981 |
| article html file updated | 3 May 2019 04:30 CEST | Update | N/A |
| article html file updated | 30 September 2017 14:38 CEST | Update | N/A |
| article html file updated | 30 August 2017 10:23 CEST | Original file | N/A |
| article xml uploaded. | 30 August 2017 10:22 CEST | Update | https://www.mdpi.com/1424-8220/17/9/1981/xml |
| article xml uploaded. | 30 August 2017 10:22 CEST | Original file | N/A |
| article pdf uploaded. | 30 August 2017 10:22 CEST | Version of Record | https://www.mdpi.com/1424-8220/17/9/1981/pdf |
