| article html file updated | 8 February 2020 06:30 CET | Update | https://www.mdpi.com/2071-1050/9/6/879 |
| article html file updated | 24 September 2019 23:21 CEST | Update | - |
| article html file updated | 3 May 2019 20:47 CEST | Update | - |
| article html file updated | 28 June 2017 14:29 CEST | Update | - |
| article html file updated | 23 May 2017 14:33 CEST | Original file | - |
| article xml uploaded. | 23 May 2017 14:32 CEST | Update | https://www.mdpi.com/2071-1050/9/6/879/xml |
| article pdf uploaded. | 23 May 2017 14:32 CEST | Version of Record | https://www.mdpi.com/2071-1050/9/6/879/pdf |
