| article html file updated | 8 February 2020 20:40 CET | Update | https://www.mdpi.com/2076-0787/6/4/85 |
| article html file updated | 2 May 2019 16:10 CEST | Update | - |
| article html file updated | 9 November 2017 11:10 CET | Original file | - |
| article xml uploaded. | 9 November 2017 11:08 CET | Update | https://www.mdpi.com/2076-0787/6/4/85/xml |
| article xml uploaded. | 9 November 2017 11:08 CET | Original file | - |
| article pdf uploaded. | 9 November 2017 11:08 CET | Updated version of record | https://www.mdpi.com/2076-0787/6/4/85/pdf |
| article pdf uploaded. | 8 November 2017 13:00 CET | Version of Record | https://www.mdpi.com/2076-0787/6/4/85/pdf-vor |
