| article html file updated | 7 February 2020 04:22 CET | Update | https://www.mdpi.com/2079-4991/6/2/31 |
| article html file updated | 6 May 2019 00:47 CEST | Update | - |
| article html file updated | 26 March 2019 20:19 CET | Update | - |
| article html file updated | 24 February 2017 10:17 CET | Original file | - |
| article pdf uploaded. | 5 February 2016 11:38 CET | Version of Record | https://www.mdpi.com/2079-4991/6/2/31/pdf |
| article xml uploaded. | 5 February 2016 11:38 CET | Original file | https://www.mdpi.com/2079-4991/6/2/31/xml |
