| article html file updated | 7 February 2020 11:23 CET | Update | https://www.mdpi.com/2297-8747/21/3/28 |
| article html file updated | 5 May 2019 10:43 CEST | Update | N/A |
| article html file updated | 27 March 2019 09:42 CET | Update | N/A |
| article html file updated | 8 July 2016 10:40 CEST | Original file | N/A |
| article xml uploaded. | 8 July 2016 10:38 CEST | Original file | https://www.mdpi.com/2297-8747/21/3/28/xml |
| article pdf uploaded. | 8 July 2016 10:38 CEST | Version of Record | https://www.mdpi.com/2297-8747/21/3/28/pdf |
