| article html file updated | 13 May 2021 05:42 CEST | Original file | https://www.mdpi.com/2311-5637/7/2/77 |
| article pdf uploaded. | 13 May 2021 05:40 CEST | Version of Record | https://www.mdpi.com/2311-5637/7/2/77/pdf |
| article xml uploaded. | 13 May 2021 05:40 CEST | Update | https://www.mdpi.com/2311-5637/7/2/77/xml |
| article xml file uploaded | 13 May 2021 05:40 CEST | Original file | N/A |
