| article html file updated | 15 December 2020 07:51 CET | Original file | https://www.mdpi.com/2312-7481/6/4/70 |
| article pdf uploaded. | 15 December 2020 07:50 CET | Version of Record | https://www.mdpi.com/2312-7481/6/4/70/pdf |
| article xml uploaded. | 15 December 2020 07:50 CET | Update | https://www.mdpi.com/2312-7481/6/4/70/xml |
| article xml file uploaded | 15 December 2020 07:50 CET | Original file | - |
