| article html file updated | 7 April 2020 06:07 CEST | Original file | https://www.mdpi.com/2410-387X/4/2/12 |
| article pdf uploaded. | 7 April 2020 06:05 CEST | Version of Record | https://www.mdpi.com/2410-387X/4/2/12/pdf |
| article xml uploaded. | 7 April 2020 06:05 CEST | Update | https://www.mdpi.com/2410-387X/4/2/12/xml |
| article xml file uploaded | 7 April 2020 06:05 CEST | Original file | N/A |
