| article html file updated | 8 February 2020 02:21 CET | Update | https://www.mdpi.com/2414-4088/1/2/6 |
| article html file updated | 24 September 2019 00:49 CEST | Update | - |
| article html file updated | 4 May 2019 04:49 CEST | Update | - |
| article html file updated | 27 March 2017 13:03 CEST | Original file | - |
| article xml uploaded. | 27 March 2017 13:02 CEST | Update | https://www.mdpi.com/2414-4088/1/2/6/xml |
| article pdf uploaded. | 27 March 2017 13:02 CEST | Version of Record | https://www.mdpi.com/2414-4088/1/2/6/pdf |
