| article html file updated | 12 February 2020 11:05 CET | Update | https://www.mdpi.com/2409-9287/4/2/21 |
| article html file updated | 9 May 2019 20:14 CEST | Original file | - |
| article pdf uploaded. | 9 May 2019 13:03 CEST | Version of Record | https://www.mdpi.com/2409-9287/4/2/21/pdf |
| article xml uploaded. | 9 May 2019 13:03 CEST | Update | https://www.mdpi.com/2409-9287/4/2/21/xml |
| article xml file uploaded | 9 May 2019 13:02 CEST | Original file | - |
