| article html file updated | 7 February 2020 21:32 CET | Update | https://www.mdpi.com/2297-8747/22/1/4 |
| article html file updated | 22 September 2019 21:49 CEST | Update | - |
| article html file updated | 4 May 2019 15:07 CEST | Update | - |
| article html file updated | 14 March 2017 07:18 CET | Original file | - |
| article xml uploaded. | 14 March 2017 07:17 CET | Update | https://www.mdpi.com/2297-8747/22/1/4/xml |
| article pdf uploaded. | 14 March 2017 07:17 CET | Updated version of record | https://www.mdpi.com/2297-8747/22/1/4/pdf |
| article pdf uploaded. | 16 January 2017 09:31 CET | Version of Record | https://www.mdpi.com/2297-8747/22/1/4/pdf-vor |
