| article html file updated | 8 February 2020 07:39 CET | Update | https://www.mdpi.com/2308-3425/4/2/7 |
| article html file updated | 25 September 2019 05:13 CEST | Update | - |
| article html file updated | 3 May 2019 18:38 CEST | Update | - |
| article html file updated | 7 June 2017 11:36 CEST | Original file | - |
| article xml uploaded. | 7 June 2017 11:35 CEST | Original file | https://www.mdpi.com/2308-3425/4/2/7/xml |
| article pdf uploaded. | 7 June 2017 11:35 CEST | Version of Record | https://www.mdpi.com/2308-3425/4/2/7/pdf |
