| article html file updated | 8 February 2020 17:19 CET | Update | https://www.mdpi.com/2226-471X/2/4/19 |
| article html file updated | 2 May 2019 23:45 CEST | Update | - |
| article html file updated | 27 September 2017 15:00 CEST | Original file | - |
| article xml uploaded. | 27 September 2017 14:59 CEST | Original file | https://www.mdpi.com/2226-471X/2/4/19/xml |
| article pdf uploaded. | 27 September 2017 14:59 CEST | Version of Record | https://www.mdpi.com/2226-471X/2/4/19/pdf |
