| article html file updated | 8 February 2020 19:08 CET | Update | https://www.mdpi.com/2310-2861/3/4/40 |
| article html file updated | 27 September 2019 22:25 CEST | Update | N/A |
| article html file updated | 2 May 2019 19:43 CEST | Update | N/A |
| article html file updated | 22 October 2017 09:49 CEST | Original file | N/A |
| article xml uploaded. | 22 October 2017 09:48 CEST | Update | https://www.mdpi.com/2310-2861/3/4/40/xml |
| article xml uploaded. | 22 October 2017 09:48 CEST | Original file | N/A |
| article pdf uploaded. | 22 October 2017 09:48 CEST | Version of Record | https://www.mdpi.com/2310-2861/3/4/40/pdf |
