| article html file updated | 8 February 2020 17:40 CET | Update | https://www.mdpi.com/2227-7099/5/4/37 |
| article html file updated | 27 September 2019 12:23 CEST | Update | - |
| article html file updated | 2 May 2019 22:59 CEST | Update | - |
| article html file updated | 2 January 2018 17:00 CET | Update | - |
| article html file updated | 2 October 2017 10:15 CEST | Original file | - |
| article xml uploaded. | 2 October 2017 10:14 CEST | Original file | https://www.mdpi.com/2227-7099/5/4/37/xml |
| article pdf uploaded. | 2 October 2017 10:14 CEST | Version of Record | https://www.mdpi.com/2227-7099/5/4/37/pdf |
