| article html file updated | 8 February 2020 06:41 CET | Update | https://www.mdpi.com/2075-4426/7/2/4 |
| article html file updated | 25 September 2019 00:14 CEST | Update | N/A |
| article html file updated | 3 May 2019 20:26 CEST | Update | N/A |
| article html file updated | 30 June 2017 05:44 CEST | Update | N/A |
| article html file updated | 25 May 2017 14:49 CEST | Original file | N/A |
| article xml uploaded. | 25 May 2017 14:48 CEST | Original file | https://www.mdpi.com/2075-4426/7/2/4/xml |
| article pdf uploaded. | 25 May 2017 14:48 CEST | Version of Record | https://www.mdpi.com/2075-4426/7/2/4/pdf |
