| article html file updated | 8 February 2020 19:19 CET | Update | https://www.mdpi.com/2071-1050/9/10/1921 |
| article html file updated | 27 September 2019 23:30 CEST | Update | - |
| article html file updated | 2 May 2019 19:17 CEST | Update | - |
| article html file updated | 3 November 2017 04:26 CET | Update | - |
| article html file updated | 24 October 2017 12:36 CEST | Original file | - |
| article xml uploaded. | 24 October 2017 12:34 CEST | Original file | https://www.mdpi.com/2071-1050/9/10/1921/xml |
| article pdf uploaded. | 24 October 2017 12:34 CEST | Version of Record | https://www.mdpi.com/2071-1050/9/10/1921/pdf |
