| article html file updated | 7 February 2020 21:17 CET | Update | https://www.mdpi.com/2410-3896/2/1/4 |
| article html file updated | 4 May 2019 15:43 CEST | Update | - |
| article html file updated | 27 October 2017 09:00 CEST | Update | - |
| article html file updated | 12 January 2017 06:31 CET | Original file | - |
| article xml uploaded. | 12 January 2017 06:30 CET | Original file | https://www.mdpi.com/2410-3896/2/1/4/xml |
| article pdf uploaded. | 12 January 2017 06:30 CET | Version of Record | https://www.mdpi.com/2410-3896/2/1/4/pdf |
