| article html file updated | 8 February 2020 08:36 CET | Update | https://www.mdpi.com/1424-8220/17/6/1421 |
| article html file updated | 25 September 2019 10:05 CEST | Update | - |
| article html file updated | 3 May 2019 16:52 CEST | Update | - |
| article html file updated | 30 June 2017 12:00 CEST | Update | - |
| article html file updated | 20 June 2017 08:43 CEST | Original file | - |
| article xml uploaded. | 20 June 2017 08:42 CEST | Update | https://www.mdpi.com/1424-8220/17/6/1421/xml |
| article pdf uploaded. | 20 June 2017 08:42 CEST | Updated version of record | https://www.mdpi.com/1424-8220/17/6/1421/pdf |
| article pdf uploaded. | 17 June 2017 12:36 CEST | Version of Record | https://www.mdpi.com/1424-8220/17/6/1421/pdf-vor |
