| article html file updated | 7 February 2020 17:07 CET | Update | https://www.mdpi.com/2075-4426/6/4/19 |
| article html file updated | 22 September 2019 04:07 CEST | Update | - |
| article html file updated | 5 May 2019 00:12 CEST | Update | - |
| article html file updated | 7 February 2017 11:27 CET | Update | - |
| article xml uploaded. | 7 February 2017 11:26 CET | Update | https://www.mdpi.com/2075-4426/6/4/19/xml |
| article html file updated | 29 December 2016 11:52 CET | Update | - |
| article html file updated | 28 October 2016 06:03 CEST | Original file | - |
| article xml uploaded. | 28 October 2016 06:02 CEST | Update | - |
| article xml uploaded. | 28 October 2016 06:02 CEST | Original file | - |
| article pdf uploaded. | 28 October 2016 06:02 CEST | Version of Record | https://www.mdpi.com/2075-4426/6/4/19/pdf |
