| article html file updated | 8 October 2020 16:53 CEST | Update | https://www.mdpi.com/2218-6581/9/1/6 |
| article html file updated | 25 March 2020 03:52 CET | Original file | - |
| article xml uploaded. | 25 March 2020 03:51 CET | Update | https://www.mdpi.com/2218-6581/9/1/6/xml |
| article pdf uploaded. | 25 March 2020 03:51 CET | Updated version of record | https://www.mdpi.com/2218-6581/9/1/6/pdf |
| article pdf uploaded. | 27 January 2020 15:41 CET | Version of Record | https://www.mdpi.com/2218-6581/9/1/6/pdf-vor |
| article xml file uploaded | 27 January 2020 15:41 CET | Original file | - |
