| article html file updated | 7 February 2020 07:06 CET | Update | https://www.mdpi.com/2297-8747/21/2/12 |
| article html file updated | 5 May 2019 18:57 CEST | Update | N/A |
| article html file updated | 27 March 2019 01:35 CET | Update | N/A |
| article html file updated | 12 April 2016 08:52 CEST | Original file | N/A |
| article xml uploaded. | 12 April 2016 08:50 CEST | Original file | https://www.mdpi.com/2297-8747/21/2/12/xml |
| article pdf uploaded. | 12 April 2016 08:50 CEST | Version of Record | https://www.mdpi.com/2297-8747/21/2/12/pdf |
