| article html file updated | 17 June 2020 12:02 CEST | Original file | https://www.mdpi.com/2305-7084/4/2/40 |
| article pdf uploaded. | 17 June 2020 12:01 CEST | Version of Record | https://www.mdpi.com/2305-7084/4/2/40/pdf |
| article xml uploaded. | 17 June 2020 12:01 CEST | Update | https://www.mdpi.com/2305-7084/4/2/40/xml |
| article xml file uploaded | 17 June 2020 12:01 CEST | Original file | N/A |
