| article html file updated | 8 February 2020 15:03 CET | Update | https://www.mdpi.com/2410-387X/1/2/15 |
| article html file updated | 26 September 2019 21:23 CEST | Update | N/A |
| article html file updated | 3 May 2019 04:03 CEST | Update | N/A |
| article html file updated | 1 September 2017 12:51 CEST | Original file | N/A |
| article xml uploaded. | 1 September 2017 12:50 CEST | Original file | https://www.mdpi.com/2410-387X/1/2/15/xml |
| article pdf uploaded. | 1 September 2017 12:50 CEST | Version of Record | https://www.mdpi.com/2410-387X/1/2/15/pdf |
