| article html file updated | 7 October 2020 13:22 CEST | Update | https://www.mdpi.com/2226-4310/7/9/137 |
| article html file updated | 22 September 2020 13:11 CEST | Original file | - |
| article pdf uploaded. | 22 September 2020 13:09 CEST | Updated version of record | https://www.mdpi.com/2226-4310/7/9/137/pdf |
| article xml uploaded. | 22 September 2020 13:09 CEST | Update | https://www.mdpi.com/2226-4310/7/9/137/xml |
| article xml file uploaded | 22 September 2020 13:09 CEST | Original file | - |
| article pdf uploaded. | 16 September 2020 16:03 CEST | Version of Record | https://www.mdpi.com/2226-4310/7/9/137/pdf-vor |
