| article html file updated | 8 February 2020 19:29 CET | Update | https://www.mdpi.com/2297-8747/22/4/42 |
| article html file updated | 28 September 2019 00:28 CEST | Update | N/A |
| article html file updated | 2 May 2019 18:55 CEST | Update | N/A |
| article html file updated | 9 November 2017 10:16 CET | Original file | N/A |
| article xml uploaded. | 9 November 2017 10:15 CET | Original file | https://www.mdpi.com/2297-8747/22/4/42/xml |
| article pdf uploaded. | 9 November 2017 10:15 CET | Updated version of record | https://www.mdpi.com/2297-8747/22/4/42/pdf |
| article pdf uploaded. | 25 October 2017 14:33 CEST | Version of Record | https://www.mdpi.com/2297-8747/22/4/42/pdf-vor |
