| article html file updated | 12 February 2020 21:56 CET | Update | https://www.mdpi.com/2411-5142/4/2/40 |
| article html file updated | 22 October 2019 11:28 CEST | Update | - |
| article html file updated | 25 June 2019 12:12 CEST | Original file | - |
| article pdf uploaded. | 25 June 2019 12:11 CEST | Version of Record | https://www.mdpi.com/2411-5142/4/2/40/pdf |
| article xml uploaded. | 25 June 2019 12:11 CEST | Update | https://www.mdpi.com/2411-5142/4/2/40/xml |
| article xml file uploaded | 25 June 2019 12:11 CEST | Original file | - |
