| article html file updated | 8 February 2020 07:09 CET | Update | https://www.mdpi.com/2297-8747/22/2/34 |
| article html file updated | 25 September 2019 02:36 CEST | Update | - |
| article html file updated | 3 May 2019 19:36 CEST | Update | - |
| article html file updated | 2 June 2017 13:48 CEST | Original file | - |
| article xml uploaded. | 2 June 2017 13:46 CEST | Original file | https://www.mdpi.com/2297-8747/22/2/34/xml |
| article pdf uploaded. | 2 June 2017 13:46 CEST | Updated version of record | https://www.mdpi.com/2297-8747/22/2/34/pdf |
| article pdf uploaded. | 31 May 2017 15:20 CEST | Version of Record | https://www.mdpi.com/2297-8747/22/2/34/pdf-vor |
