| article html file updated | 16 June 2021 08:41 CEST | Original file | https://www.mdpi.com/2313-0105/7/2/39 |
| article pdf uploaded. | 16 June 2021 08:40 CEST | Updated version of record | https://www.mdpi.com/2313-0105/7/2/39/pdf |
| article xml uploaded. | 16 June 2021 08:40 CEST | Update | https://www.mdpi.com/2313-0105/7/2/39/xml |
| article xml file uploaded | 16 June 2021 08:40 CEST | Original file | - |
| article pdf uploaded. | 15 June 2021 11:35 CEST | Version of Record | https://www.mdpi.com/2313-0105/7/2/39/pdf-vor |
