| article html file updated | 7 February 2020 20:53 CET | Update | https://www.mdpi.com/2071-1050/9/1/69 |
| article html file updated | 22 September 2019 18:26 CEST | Update | - |
| article html file updated | 4 May 2019 16:34 CEST | Update | - |
| article html file updated | 7 February 2017 10:03 CET | Update | - |
| article html file updated | 6 January 2017 08:59 CET | Original file | - |
| article xml uploaded. | 6 January 2017 08:58 CET | Original file | https://www.mdpi.com/2071-1050/9/1/69/xml |
| article pdf uploaded. | 6 January 2017 08:58 CET | Version of Record | https://www.mdpi.com/2071-1050/9/1/69/pdf |
