| article html file updated | 8 February 2020 20:19 CET | Update | https://www.mdpi.com/2305-7084/1/2/12 |
| article html file updated | 28 September 2019 05:35 CEST | Update | N/A |
| article html file updated | 2 May 2019 17:01 CEST | Update | N/A |
| article html file updated | 3 November 2017 16:16 CET | Original file | N/A |
| article xml uploaded. | 3 November 2017 16:15 CET | Original file | https://www.mdpi.com/2305-7084/1/2/12/xml |
| article pdf uploaded. | 3 November 2017 16:15 CET | Version of Record | https://www.mdpi.com/2305-7084/1/2/12/pdf |
