| article html file updated | 8 February 2020 18:06 CET | Update | https://www.mdpi.com/2305-7084/1/2/9 |
| article html file updated | 27 September 2019 15:55 CEST | Update | N/A |
| article html file updated | 2 May 2019 22:03 CEST | Update | N/A |
| article html file updated | 12 October 2017 09:15 CEST | Original file | N/A |
| article xml uploaded. | 12 October 2017 09:14 CEST | Original file | https://www.mdpi.com/2305-7084/1/2/9/xml |
| article pdf uploaded. | 12 October 2017 09:13 CEST | Updated version of record | https://www.mdpi.com/2305-7084/1/2/9/pdf |
| article pdf uploaded. | 11 October 2017 12:27 CEST | Version of Record | https://www.mdpi.com/2305-7084/1/2/9/pdf-vor |
