| article html file updated | 8 February 2020 17:12 CET | Update | https://www.mdpi.com/2308-3417/2/4/31 |
| article html file updated | 27 September 2019 09:18 CEST | Update | - |
| article html file updated | 3 May 2019 00:00 CEST | Update | - |
| article html file updated | 26 September 2017 14:39 CEST | Original file | - |
| article xml uploaded. | 26 September 2017 14:37 CEST | Original file | https://www.mdpi.com/2308-3417/2/4/31/xml |
| article pdf uploaded. | 26 September 2017 14:37 CEST | Version of Record | https://www.mdpi.com/2308-3417/2/4/31/pdf |
