| article html file updated | 10 June 2021 10:19 CEST | Original file | https://www.mdpi.com/2226-471X/6/2/104 |
| article pdf uploaded. | 10 June 2021 10:18 CEST | Version of Record | https://www.mdpi.com/2226-471X/6/2/104/pdf |
| article xml uploaded. | 10 June 2021 10:17 CEST | Update | https://www.mdpi.com/2226-471X/6/2/104/xml |
| article xml file uploaded | 10 June 2021 10:17 CEST | Original file | N/A |
