| article html file updated | 7 February 2020 14:49 CET | Update | https://www.mdpi.com/2071-1050/8/9/918 |
| article html file updated | 5 May 2019 04:23 CEST | Update | - |
| article html file updated | 27 September 2016 05:23 CEST | Update | - |
| article html file updated | 12 September 2016 04:16 CEST | Original file | - |
| article xml uploaded. | 12 September 2016 04:15 CEST | Update | https://www.mdpi.com/2071-1050/8/9/918/xml |
| article xml uploaded. | 12 September 2016 04:15 CEST | Original file | - |
| article pdf uploaded. | 12 September 2016 04:15 CEST | Version of Record | https://www.mdpi.com/2071-1050/8/9/918/pdf |
