| article html file updated | 7 February 2020 21:30 CET | Update | https://www.mdpi.com/2071-1050/9/1/121 |
| article html file updated | 22 September 2019 21:37 CEST | Update | - |
| article html file updated | 4 May 2019 15:13 CEST | Update | - |
| article html file updated | 7 February 2017 10:17 CET | Update | - |
| article html file updated | 14 January 2017 11:30 CET | Original file | - |
| article xml uploaded. | 14 January 2017 11:28 CET | Original file | https://www.mdpi.com/2071-1050/9/1/121/xml |
| article pdf uploaded. | 14 January 2017 11:28 CET | Version of Record | https://www.mdpi.com/2071-1050/9/1/121/pdf |
