| article html file updated | 8 February 2020 20:38 CET | Update | https://www.mdpi.com/2076-0787/6/4/83 |
| article html file updated | 2 May 2019 16:16 CEST | Update | - |
| article html file updated | 8 November 2017 13:13 CET | Original file | - |
| article xml uploaded. | 8 November 2017 13:12 CET | Original file | https://www.mdpi.com/2076-0787/6/4/83/xml |
| article pdf uploaded. | 8 November 2017 13:12 CET | Version of Record | https://www.mdpi.com/2076-0787/6/4/83/pdf |
