| article html file updated | 8 February 2020 04:17 CET | Update | https://www.mdpi.com/2072-6694/9/4/39 |
| article html file updated | 24 September 2019 11:42 CEST | Update | - |
| article html file updated | 4 May 2019 00:56 CEST | Update | - |
| article html file updated | 28 April 2017 05:33 CEST | Update | - |
| article html file updated | 24 April 2017 13:01 CEST | Original file | - |
| article xml uploaded. | 24 April 2017 13:00 CEST | Original file | https://www.mdpi.com/2072-6694/9/4/39/xml |
| article pdf uploaded. | 24 April 2017 13:00 CEST | Version of Record | https://www.mdpi.com/2072-6694/9/4/39/pdf |
