| article html file updated | 17 June 2021 04:13 CEST | Original file | https://www.mdpi.com/2571-631X/4/2/31 |
| article pdf uploaded. | 17 June 2021 04:11 CEST | Updated version of record | https://www.mdpi.com/2571-631X/4/2/31/pdf |
| article xml uploaded. | 17 June 2021 04:11 CEST | Update | https://www.mdpi.com/2571-631X/4/2/31/xml |
| article xml file uploaded | 17 June 2021 04:11 CEST | Original file | N/A |
| article pdf uploaded. | 15 June 2021 14:49 CEST | Version of Record | https://www.mdpi.com/2571-631X/4/2/31/pdf-vor |
