| article html file updated | 7 February 2020 10:26 CET | Update | https://www.mdpi.com/2297-8747/21/2/25 |
| article html file updated | 5 May 2019 12:26 CEST | Update | N/A |
| article html file updated | 27 March 2019 07:57 CET | Update | N/A |
| article html file updated | 20 June 2016 08:18 CEST | Original file | N/A |
| article xml uploaded. | 20 June 2016 08:17 CEST | Original file | https://www.mdpi.com/2297-8747/21/2/25/xml |
| article pdf uploaded. | 20 June 2016 08:17 CEST | Version of Record | https://www.mdpi.com/2297-8747/21/2/25/pdf |
