| article html file updated | 8 February 2020 19:58 CET | Update | https://www.mdpi.com/2414-6366/2/4/57 |
| article html file updated | 28 September 2019 03:27 CEST | Update | - |
| article html file updated | 2 May 2019 17:49 CEST | Update | - |
| article html file updated | 31 October 2017 14:19 CET | Original file | - |
| article xml uploaded. | 31 October 2017 14:18 CET | Original file | https://www.mdpi.com/2414-6366/2/4/57/xml |
| article pdf uploaded. | 31 October 2017 14:18 CET | Version of Record | https://www.mdpi.com/2414-6366/2/4/57/pdf |
