| article html file updated | 7 February 2020 20:08 CET | Update | https://www.mdpi.com/1424-8220/17/1/9 |
| article html file updated | 22 September 2019 14:18 CEST | Update | N/A |
| article html file updated | 4 May 2019 18:09 CEST | Update | N/A |
| article html file updated | 8 February 2017 08:36 CET | Update | N/A |
| article html file updated | 22 December 2016 12:19 CET | Original file | N/A |
| article xml uploaded. | 22 December 2016 12:17 CET | Original file | https://www.mdpi.com/1424-8220/17/1/9/xml |
| article pdf uploaded. | 22 December 2016 12:17 CET | Version of Record | https://www.mdpi.com/1424-8220/17/1/9/pdf |
