| article html file updated | 8 February 2020 06:46 CET | Update | https://www.mdpi.com/1424-8220/17/6/1220 |
| article html file updated | 25 September 2019 00:43 CEST | Update | - |
| article html file updated | 3 May 2019 20:17 CEST | Update | - |
| article html file updated | 30 June 2017 11:31 CEST | Update | - |
| article html file updated | 26 May 2017 11:48 CEST | Original file | - |
| article xml uploaded. | 26 May 2017 11:46 CEST | Update | https://www.mdpi.com/1424-8220/17/6/1220/xml |
| article pdf uploaded. | 26 May 2017 11:46 CEST | Version of Record | https://www.mdpi.com/1424-8220/17/6/1220/pdf |
