| article html file updated | 8 June 2021 04:48 CEST | Original file | https://www.mdpi.com/2304-6732/8/6/201 |
| article pdf uploaded. | 8 June 2021 04:47 CEST | Updated version of record | https://www.mdpi.com/2304-6732/8/6/201/pdf |
| article xml uploaded. | 8 June 2021 04:47 CEST | Update | https://www.mdpi.com/2304-6732/8/6/201/xml |
| article xml file uploaded | 8 June 2021 04:47 CEST | Original file | N/A |
| article pdf uploaded. | 4 June 2021 15:06 CEST | Updated version of record | https://www.mdpi.com/2304-6732/8/6/201/pdf-vor |
| article pdf uploaded. | 4 June 2021 14:48 CEST | Version of Record | https://www.mdpi.com/2304-6732/8/6/201/pdf-vor |
