| article html file updated | 8 February 2020 19:17 CET | Update | https://www.mdpi.com/2075-1680/6/4/28 |
| article html file updated | 2 May 2019 19:21 CEST | Update | - |
| article html file updated | 2 January 2018 13:22 CET | Update | - |
| article html file updated | 25 October 2017 08:10 CEST | Original file | - |
| article xml uploaded. | 25 October 2017 08:09 CEST | Original file | https://www.mdpi.com/2075-1680/6/4/28/xml |
| article pdf uploaded. | 25 October 2017 08:09 CEST | Updated version of record | https://www.mdpi.com/2075-1680/6/4/28/pdf |
| article pdf uploaded. | 24 October 2017 11:50 CEST | Version of Record | https://www.mdpi.com/2075-1680/6/4/28/pdf-vor |
