| article html file updated | 7 February 2020 11:00 CET | Update | https://www.mdpi.com/2297-8747/21/3/26 |
| article html file updated | 5 May 2019 11:24 CEST | Update | - |
| article html file updated | 27 March 2019 08:59 CET | Update | - |
| article html file updated | 30 June 2016 08:37 CEST | Original file | - |
| article xml uploaded. | 30 June 2016 08:36 CEST | Original file | https://www.mdpi.com/2297-8747/21/3/26/xml |
| article pdf uploaded. | 30 June 2016 08:36 CEST | Version of Record | https://www.mdpi.com/2297-8747/21/3/26/pdf |
