| article html file updated | 19 June 2020 04:38 CEST | Original file | https://www.mdpi.com/2076-0752/9/2/63 |
| article pdf uploaded. | 19 June 2020 04:36 CEST | Updated version of record | https://www.mdpi.com/2076-0752/9/2/63/pdf |
| article xml uploaded. | 19 June 2020 04:36 CEST | Update | https://www.mdpi.com/2076-0752/9/2/63/xml |
| article xml file uploaded | 19 June 2020 04:36 CEST | Update | - |
| article pdf uploaded. | 21 May 2020 13:43 CEST | Version of Record | https://www.mdpi.com/2076-0752/9/2/63/pdf-vor |
| article xml file uploaded | 21 May 2020 13:43 CEST | Original file | - |
