| article html file updated | 7 February 2020 10:15 CET | Update | https://www.mdpi.com/2297-8747/21/2/24 |
| article html file updated | 5 May 2019 12:47 CEST | Update | - |
| article html file updated | 27 March 2019 07:39 CET | Update | - |
| article html file updated | 16 June 2016 09:19 CEST | Original file | - |
| article xml uploaded. | 16 June 2016 09:17 CEST | Original file | https://www.mdpi.com/2297-8747/21/2/24/xml |
| article pdf uploaded. | 16 June 2016 09:17 CEST | Version of Record | https://www.mdpi.com/2297-8747/21/2/24/pdf |
