| article html file updated | 7 February 2020 09:55 CET | Update | https://www.mdpi.com/2297-8747/21/2/22 |
| article html file updated | 5 May 2019 13:26 CEST | Update | - |
| article html file updated | 27 March 2019 07:01 CET | Update | - |
| article html file updated | 8 June 2016 14:58 CEST | Original file | - |
| article xml uploaded. | 8 June 2016 14:56 CEST | Original file | https://www.mdpi.com/2297-8747/21/2/22/xml |
| article pdf uploaded. | 8 June 2016 14:56 CEST | Version of Record | https://www.mdpi.com/2297-8747/21/2/22/pdf |
