| article html file updated | 7 February 2020 21:28 CET | Update | https://www.mdpi.com/2071-1050/9/1/117 |
| article html file updated | 22 September 2019 21:20 CEST | Update | - |
| article html file updated | 4 May 2019 15:19 CEST | Update | - |
| article html file updated | 7 February 2017 10:17 CET | Update | - |
| article html file updated | 13 January 2017 12:46 CET | Original file | - |
| article xml uploaded. | 13 January 2017 12:45 CET | Update | https://www.mdpi.com/2071-1050/9/1/117/xml |
| article xml uploaded. | 13 January 2017 12:45 CET | Original file | - |
| article pdf uploaded. | 13 January 2017 12:45 CET | Version of Record | https://www.mdpi.com/2071-1050/9/1/117/pdf |
