| article html file updated | 8 February 2020 20:35 CET | Update | https://www.mdpi.com/2077-0375/7/4/63 |
| article html file updated | 28 September 2019 07:28 CEST | Update | - |
| article html file updated | 2 May 2019 16:23 CEST | Update | - |
| article html file updated | 2 January 2018 20:22 CET | Update | - |
| article html file updated | 7 November 2017 13:03 CET | Original file | - |
| article xml uploaded. | 7 November 2017 13:02 CET | Update | https://www.mdpi.com/2077-0375/7/4/63/xml |
| article xml uploaded. | 7 November 2017 13:02 CET | Original file | - |
| article pdf uploaded. | 7 November 2017 13:02 CET | Version of Record | https://www.mdpi.com/2077-0375/7/4/63/pdf |
