| article html file updated | 14 May 2020 04:45 CEST | Update | https://www.mdpi.com/2076-0752/9/2/59 |
| article pdf uploaded. | 14 May 2020 04:44 CEST | Updated version of record | https://www.mdpi.com/2076-0752/9/2/59/pdf |
| article xml uploaded. | 14 May 2020 04:44 CEST | Update | https://www.mdpi.com/2076-0752/9/2/59/xml |
| article xml file uploaded | 14 May 2020 04:44 CEST | Update | - |
| article html file updated | 13 May 2020 13:28 CEST | Original file | - |
| article pdf uploaded. | 13 May 2020 13:27 CEST | Version of Record | https://www.mdpi.com/2076-0752/9/2/59/pdf-vor |
| article xml file uploaded | 13 May 2020 13:27 CEST | Original file | - |
