| article html file updated | 7 February 2020 05:27 CET | Update | https://www.mdpi.com/2297-8747/21/1/1 |
| article html file updated | 5 May 2019 22:24 CEST | Update | N/A |
| article html file updated | 26 March 2019 22:36 CET | Original file | N/A |
| article pdf uploaded. | 4 March 2016 16:40 CET | Updated version of record | https://www.mdpi.com/2297-8747/21/1/1/pdf |
| article xml uploaded. | 4 March 2016 12:36 CET | Original file | https://www.mdpi.com/2297-8747/21/1/1/xml |
