| article pdf uploaded. | 7 May 2020 08:50 CEST | Updated version of record | https://www.mdpi.com/2504-3900/17/1/7/pdf |
| article xml file uploaded | 7 May 2020 08:50 CEST | Update | N/A |
| article pdf uploaded. | 12 September 2019 08:46 CEST | Version of Record | https://www.mdpi.com/2504-3900/17/1/7/pdf-vor |
| article xml file uploaded | 12 September 2019 08:46 CEST | Original file | N/A |
