| article html file updated | 8 February 2020 03:44 CET | Update | https://www.mdpi.com/1424-8220/17/4/880 |
| article html file updated | 4 May 2019 01:55 CEST | Update | - |
| article html file updated | 29 April 2017 14:18 CEST | Update | - |
| article html file updated | 18 April 2017 15:53 CEST | Original file | - |
| article xml uploaded. | 18 April 2017 15:51 CEST | Original file | https://www.mdpi.com/1424-8220/17/4/880/xml |
| article pdf uploaded. | 18 April 2017 15:51 CEST | Updated version of record | https://www.mdpi.com/1424-8220/17/4/880/pdf |
| article pdf uploaded. | 17 April 2017 15:05 CEST | Version of Record | https://www.mdpi.com/1424-8220/17/4/880/pdf-vor |
