| article html file updated | 8 February 2020 21:32 CET | Update | https://www.mdpi.com/2071-1050/9/11/2121 |
| article html file updated | 28 September 2019 13:44 CEST | Update | - |
| article html file updated | 2 May 2019 14:14 CEST | Update | - |
| article html file updated | 18 April 2019 11:53 CEST | Update | - |
| article html file updated | 30 November 2017 13:22 CET | Update | - |
| article html file updated | 20 November 2017 11:47 CET | Original file | - |
| article xml uploaded. | 20 November 2017 11:46 CET | Original file | https://www.mdpi.com/2071-1050/9/11/2121/xml |
| article pdf uploaded. | 20 November 2017 11:46 CET | Updated version of record | https://www.mdpi.com/2071-1050/9/11/2121/pdf |
| article pdf uploaded. | 17 November 2017 16:02 CET | Version of Record | https://www.mdpi.com/2071-1050/9/11/2121/pdf-vor |
