| article html file updated | 8 February 2020 07:37 CET | Update | https://www.mdpi.com/2410-3896/2/2/20 |
| article html file updated | 3 May 2019 18:43 CEST | Update | - |
| article html file updated | 27 October 2017 09:01 CEST | Update | - |
| article html file updated | 6 June 2017 14:13 CEST | Original file | - |
| article xml uploaded. | 6 June 2017 14:12 CEST | Original file | https://www.mdpi.com/2410-3896/2/2/20/xml |
| article pdf uploaded. | 6 June 2017 14:12 CEST | Version of Record | https://www.mdpi.com/2410-3896/2/2/20/pdf |
