| article html file updated | 8 February 2020 08:51 CET | Update | https://www.mdpi.com/2072-6643/9/6/637 |
| article html file updated | 25 September 2019 11:22 CEST | Update | - |
| article html file updated | 3 May 2019 16:24 CEST | Update | - |
| article html file updated | 29 June 2017 11:49 CEST | Update | - |
| article html file updated | 21 June 2017 15:45 CEST | Original file | - |
| article xml uploaded. | 21 June 2017 15:44 CEST | Original file | https://www.mdpi.com/2072-6643/9/6/637/xml |
| article pdf uploaded. | 21 June 2017 15:44 CEST | Version of Record | https://www.mdpi.com/2072-6643/9/6/637/pdf |
