| article html file updated | 8 February 2020 17:38 CET | Update | https://www.mdpi.com/2227-9040/5/4/27 |
| article html file updated | 27 September 2019 12:03 CEST | Update | - |
| article html file updated | 2 May 2019 23:05 CEST | Update | - |
| article html file updated | 2 January 2018 13:34 CET | Update | - |
| article html file updated | 30 September 2017 16:07 CEST | Original file | - |
| article xml uploaded. | 30 September 2017 14:25 CEST | Original file | https://www.mdpi.com/2227-9040/5/4/27/xml |
| article pdf uploaded. | 30 September 2017 14:25 CEST | Version of Record | https://www.mdpi.com/2227-9040/5/4/27/pdf |
