| article html file updated | 8 February 2020 04:00 CET | Update | https://www.mdpi.com/2072-6643/9/4/404 |
| article html file updated | 24 September 2019 10:13 CEST | Update | - |
| article html file updated | 4 May 2019 01:26 CEST | Update | - |
| article html file updated | 28 April 2017 11:52 CEST | Update | - |
| article html file updated | 20 April 2017 12:29 CEST | Original file | - |
| article xml uploaded. | 20 April 2017 12:28 CEST | Original file | https://www.mdpi.com/2072-6643/9/4/404/xml |
| article pdf uploaded. | 20 April 2017 12:28 CEST | Version of Record | https://www.mdpi.com/2072-6643/9/4/404/pdf |
