| article html file updated | 7 February 2020 09:05 CET | Update | https://www.mdpi.com/2297-8747/21/2/19 |
| article html file updated | 5 May 2019 15:04 CEST | Update | - |
| article html file updated | 27 March 2019 05:24 CET | Update | - |
| article html file updated | 21 May 2016 09:57 CEST | Original file | - |
| article xml uploaded. | 21 May 2016 09:56 CEST | Original file | https://www.mdpi.com/2297-8747/21/2/19/xml |
| article pdf uploaded. | 21 May 2016 09:56 CEST | Version of Record | https://www.mdpi.com/2297-8747/21/2/19/pdf |
