| article html file updated | 17 May 2021 07:26 CEST | Update | https://www.mdpi.com/2311-5521/6/5/188 |
| article pdf uploaded. | 17 May 2021 07:24 CEST | Updated version of record | https://www.mdpi.com/2311-5521/6/5/188/pdf |
| article xml uploaded. | 17 May 2021 07:24 CEST | Update | https://www.mdpi.com/2311-5521/6/5/188/xml |
| article xml file uploaded | 17 May 2021 07:24 CEST | Update | N/A |
| article html file updated | 14 May 2021 15:53 CEST | Original file | N/A |
| article pdf uploaded. | 14 May 2021 15:52 CEST | Version of Record | https://www.mdpi.com/2311-5521/6/5/188/pdf-vor |
| article xml file uploaded | 14 May 2021 15:52 CEST | Original file | N/A |
