| article html file updated | 7 February 2020 03:32 CET | Update | https://www.mdpi.com/2079-4991/6/1/20 |
| article html file updated | 6 May 2019 02:22 CEST | Update | - |
| article html file updated | 26 March 2019 18:41 CET | Update | - |
| article html file updated | 24 February 2017 10:14 CET | Original file | - |
| article pdf uploaded. | 18 January 2016 09:46 CET | Version of Record | https://www.mdpi.com/2079-4991/6/1/20/pdf |
| article xml uploaded. | 18 January 2016 09:46 CET | Original file | https://www.mdpi.com/2079-4991/6/1/20/xml |
