| article html file updated | 7 February 2020 20:41 CET | Update | https://www.mdpi.com/2071-1050/9/1/61 |
| article html file updated | 22 September 2019 17:18 CEST | Update | - |
| article html file updated | 4 May 2019 17:01 CEST | Update | - |
| article html file updated | 7 February 2017 09:57 CET | Update | - |
| article html file updated | 2 January 2017 12:20 CET | Original file | - |
| article xml uploaded. | 2 January 2017 12:19 CET | Update | https://www.mdpi.com/2071-1050/9/1/61/xml |
| article pdf uploaded. | 2 January 2017 12:19 CET | Version of Record | https://www.mdpi.com/2071-1050/9/1/61/pdf |
