| article html file updated | 7 February 2020 14:44 CET | Update | https://www.mdpi.com/2071-1050/8/9/920 |
| article html file updated | 22 September 2019 00:41 CEST | Update | - |
| article html file updated | 5 May 2019 04:33 CEST | Update | - |
| article html file updated | 27 September 2016 05:23 CEST | Update | - |
| article html file updated | 9 September 2016 13:47 CEST | Original file | - |
| article xml uploaded. | 9 September 2016 13:46 CEST | Original file | https://www.mdpi.com/2071-1050/8/9/920/xml |
| article pdf uploaded. | 9 September 2016 13:46 CEST | Version of Record | https://www.mdpi.com/2071-1050/8/9/920/pdf |
