| article html file updated | 7 February 2020 23:54 CET | Update | https://www.mdpi.com/2412-3811/2/1/4 |
| article html file updated | 23 September 2019 10:43 CEST | Update | N/A |
| article html file updated | 4 May 2019 10:15 CEST | Update | N/A |
| article html file updated | 21 February 2017 12:29 CET | Original file | N/A |
| article xml uploaded. | 21 February 2017 12:28 CET | Original file | https://www.mdpi.com/2412-3811/2/1/4/xml |
| article pdf uploaded. | 21 February 2017 12:28 CET | Version of Record | https://www.mdpi.com/2412-3811/2/1/4/pdf |
