| article html file updated | 8 February 2020 19:48 CET | Update | https://www.mdpi.com/2227-7080/5/4/71 |
| article html file updated | 28 September 2019 02:29 CEST | Update | - |
| article html file updated | 2 May 2019 18:10 CEST | Update | - |
| article html file updated | 2 January 2018 11:13 CET | Update | - |
| article html file updated | 30 October 2017 10:38 CET | Original file | - |
| article xml uploaded. | 30 October 2017 10:37 CET | Update | https://www.mdpi.com/2227-7080/5/4/71/xml |
| article xml uploaded. | 30 October 2017 10:37 CET | Original file | - |
| article pdf uploaded. | 30 October 2017 10:37 CET | Version of Record | https://www.mdpi.com/2227-7080/5/4/71/pdf |
