| article html file updated | 7 February 2020 15:51 CET | Update | https://www.mdpi.com/2079-9268/6/4/19 |
| article html file updated | 5 May 2019 02:32 CEST | Update | - |
| article html file updated | 30 September 2016 12:41 CEST | Original file | - |
| article xml uploaded. | 30 September 2016 12:40 CEST | Original file | https://www.mdpi.com/2079-9268/6/4/19/xml |
| article pdf uploaded. | 30 September 2016 12:40 CEST | Version of Record | https://www.mdpi.com/2079-9268/6/4/19/pdf |
