| article html file updated | 18 June 2020 11:42 CEST | Original file | https://www.mdpi.com/2076-0752/9/2/61 |
| article pdf uploaded. | 18 June 2020 11:41 CEST | Updated version of record | https://www.mdpi.com/2076-0752/9/2/61/pdf |
| article xml uploaded. | 18 June 2020 11:40 CEST | Update | https://www.mdpi.com/2076-0752/9/2/61/xml |
| article xml file uploaded | 18 June 2020 11:40 CEST | Update | - |
| article pdf uploaded. | 20 May 2020 15:46 CEST | Version of Record | https://www.mdpi.com/2076-0752/9/2/61/pdf-vor |
| article xml file uploaded | 20 May 2020 15:46 CEST | Original file | - |
