| article html file updated | 7 February 2020 22:14 CET | Update | https://www.mdpi.com/2071-1050/9/2/171 |
| article html file updated | 4 May 2019 13:35 CEST | Update | - |
| article html file updated | 1 March 2017 10:23 CET | Update | - |
| article html file updated | 25 January 2017 10:58 CET | Original file | - |
| article xml uploaded. | 25 January 2017 10:56 CET | Original file | https://www.mdpi.com/2071-1050/9/2/171/xml |
| article pdf uploaded. | 25 January 2017 10:56 CET | Version of Record | https://www.mdpi.com/2071-1050/9/2/171/pdf |
