| article html file updated | 7 February 2020 23:53 CET | Update | https://www.mdpi.com/2297-8747/22/1/20 |
| article html file updated | 23 September 2019 10:39 CEST | Update | - |
| article html file updated | 4 May 2019 10:17 CEST | Update | - |
| article html file updated | 21 February 2017 10:29 CET | Original file | - |
| article xml uploaded. | 21 February 2017 10:28 CET | Original file | https://www.mdpi.com/2297-8747/22/1/20/xml |
| article pdf uploaded. | 21 February 2017 10:28 CET | Version of Record | https://www.mdpi.com/2297-8747/22/1/20/pdf |
