| article html file updated | 23 February 2021 07:32 CET | Update | https://www.mdpi.com/2079-3200/5/4/34 |
| article html file updated | 8 February 2020 20:33 CET | Update | - |
| article html file updated | 28 September 2019 07:17 CEST | Update | - |
| article html file updated | 2 May 2019 16:27 CEST | Update | - |
| article html file updated | 7 November 2017 13:55 CET | Original file | - |
| article xml uploaded. | 7 November 2017 13:54 CET | Original file | https://www.mdpi.com/2079-3200/5/4/34/xml |
| article pdf uploaded. | 7 November 2017 13:54 CET | Version of Record | https://www.mdpi.com/2079-3200/5/4/34/pdf |
