| article html file updated | 8 February 2020 18:52 CET | Update | https://www.mdpi.com/2226-4787/5/4/58 |
| article html file updated | 27 September 2019 20:52 CEST | Update | - |
| article html file updated | 2 May 2019 20:20 CEST | Update | - |
| article html file updated | 2 January 2018 14:24 CET | Update | - |
| article html file updated | 19 October 2017 11:19 CEST | Original file | - |
| article xml uploaded. | 19 October 2017 11:17 CEST | Update | https://www.mdpi.com/2226-4787/5/4/58/xml |
| article xml uploaded. | 19 October 2017 11:17 CEST | Original file | - |
| article pdf uploaded. | 19 October 2017 11:17 CEST | Version of Record | https://www.mdpi.com/2226-4787/5/4/58/pdf |
