| article html file updated | 8 February 2020 17:54 CET | Update | https://www.mdpi.com/2075-1702/5/4/22 |
| article html file updated | 27 September 2019 14:10 CEST | Update | - |
| article html file updated | 2 May 2019 22:31 CEST | Update | - |
| article html file updated | 2 January 2018 14:00 CET | Update | - |
| article html file updated | 10 October 2017 13:03 CEST | Original file | - |
| article xml uploaded. | 10 October 2017 13:01 CEST | Original file | https://www.mdpi.com/2075-1702/5/4/22/xml |
| article pdf uploaded. | 10 October 2017 13:01 CEST | Updated version of record | https://www.mdpi.com/2075-1702/5/4/22/pdf |
| article pdf uploaded. | 6 October 2017 12:34 CEST | Version of Record | https://www.mdpi.com/2075-1702/5/4/22/pdf-vor |
