| article html file updated | 23 November 2020 16:32 CET | Original file | https://www.mdpi.com/2076-0787/9/4/137 |
| article pdf uploaded. | 23 November 2020 16:31 CET | Version of Record | https://www.mdpi.com/2076-0787/9/4/137/pdf |
| article xml uploaded. | 23 November 2020 16:31 CET | Update | https://www.mdpi.com/2076-0787/9/4/137/xml |
| article xml file uploaded | 23 November 2020 16:31 CET | Original file | - |
