| article html file updated | 8 February 2020 03:43 CET | Update | https://www.mdpi.com/1424-8220/17/4/874 |
| article html file updated | 24 September 2019 08:30 CEST | Update | - |
| article html file updated | 4 May 2019 01:59 CEST | Update | - |
| article html file updated | 29 April 2017 14:16 CEST | Update | - |
| article html file updated | 16 April 2017 12:33 CEST | Original file | - |
| article xml uploaded. | 16 April 2017 12:31 CEST | Update | https://www.mdpi.com/1424-8220/17/4/874/xml |
| article pdf uploaded. | 16 April 2017 12:31 CEST | Version of Record | https://www.mdpi.com/1424-8220/17/4/874/pdf |
