| article html file updated | 8 February 2020 14:59 CET | Update | https://www.mdpi.com/1424-8220/17/9/1999 |
| article html file updated | 26 September 2019 21:01 CEST | Update | N/A |
| article html file updated | 3 May 2019 04:11 CEST | Update | N/A |
| article html file updated | 30 September 2017 14:42 CEST | Update | N/A |
| article html file updated | 1 September 2017 08:40 CEST | Original file | N/A |
| article xml uploaded. | 1 September 2017 07:53 CEST | Original file | https://www.mdpi.com/1424-8220/17/9/1999/xml |
| article pdf uploaded. | 1 September 2017 07:53 CEST | Updated version of record | https://www.mdpi.com/1424-8220/17/9/1999/pdf |
| article pdf uploaded. | 31 August 2017 12:38 CEST | Version of Record | https://www.mdpi.com/1424-8220/17/9/1999/pdf-vor |
