| article html file updated | 8 February 2020 06:46 CET | Update | https://www.mdpi.com/2071-1050/9/6/897 |
| article html file updated | 25 September 2019 00:41 CEST | Update | - |
| article html file updated | 3 May 2019 20:18 CEST | Update | - |
| article html file updated | 28 June 2017 14:32 CEST | Update | - |
| article html file updated | 26 May 2017 11:23 CEST | Original file | - |
| article xml uploaded. | 26 May 2017 11:22 CEST | Original file | https://www.mdpi.com/2071-1050/9/6/897/xml |
| article pdf uploaded. | 26 May 2017 11:22 CEST | Version of Record | https://www.mdpi.com/2071-1050/9/6/897/pdf |
