| article html file updated | 8 February 2020 05:58 CET | Update | https://www.mdpi.com/2414-4088/1/2/9 |
| article html file updated | 24 September 2019 20:29 CEST | Update | - |
| article html file updated | 3 May 2019 21:50 CEST | Update | - |
| article html file updated | 23 May 2017 04:18 CEST | Update | - |
| article html file updated | 16 May 2017 12:15 CEST | Original file | - |
| article xml uploaded. | 16 May 2017 12:14 CEST | Update | https://www.mdpi.com/2414-4088/1/2/9/xml |
| article pdf uploaded. | 16 May 2017 12:14 CEST | Version of Record | https://www.mdpi.com/2414-4088/1/2/9/pdf |
