| article html file updated | 8 February 2020 18:41 CET | Update | https://www.mdpi.com/2075-471X/6/4/19 |
| article html file updated | 2 May 2019 20:45 CEST | Update | - |
| article html file updated | 17 October 2017 12:51 CEST | Original file | - |
| article xml uploaded. | 17 October 2017 12:50 CEST | Original file | https://www.mdpi.com/2075-471X/6/4/19/xml |
| article pdf uploaded. | 17 October 2017 12:50 CEST | Version of Record | https://www.mdpi.com/2075-471X/6/4/19/pdf |
