| article html file updated | 8 February 2020 20:38 CET | Update | https://www.mdpi.com/2079-9721/5/4/25 |
| article html file updated | 2 May 2019 16:17 CEST | Update | - |
| article html file updated | 2 January 2018 20:44 CET | Update | - |
| article html file updated | 8 November 2017 10:18 CET | Original file | - |
| article xml uploaded. | 8 November 2017 10:17 CET | Original file | https://www.mdpi.com/2079-9721/5/4/25/xml |
| article pdf uploaded. | 8 November 2017 10:17 CET | Version of Record | https://www.mdpi.com/2079-9721/5/4/25/pdf |
