| article html file updated | 6 June 2020 13:23 CEST | Original file | https://www.mdpi.com/2306-5338/7/2/31 |
| article pdf uploaded. | 6 June 2020 13:22 CEST | Version of Record | https://www.mdpi.com/2306-5338/7/2/31/pdf |
| article xml uploaded. | 6 June 2020 13:22 CEST | Update | https://www.mdpi.com/2306-5338/7/2/31/xml |
| article xml file uploaded | 6 June 2020 13:22 CEST | Original file | - |
