| article html file updated | 17 June 2020 10:07 CEST | Original file | https://www.mdpi.com/2409-9287/5/2/9 |
| article pdf uploaded. | 17 June 2020 10:06 CEST | Updated version of record | https://www.mdpi.com/2409-9287/5/2/9/pdf |
| article xml uploaded. | 17 June 2020 10:06 CEST | Update | https://www.mdpi.com/2409-9287/5/2/9/xml |
| article xml file uploaded | 17 June 2020 10:06 CEST | Original file | N/A |
| article pdf uploaded. | 15 June 2020 07:49 CEST | Updated version of record | https://www.mdpi.com/2409-9287/5/2/9/pdf-vor |
| article pdf uploaded. | 12 June 2020 11:38 CEST | Version of Record | https://www.mdpi.com/2409-9287/5/2/9/pdf-vor |
