| article html file updated | 8 February 2020 23:25 CET | Update | https://www.mdpi.com/2071-1050/9/12/2271 |
| article html file updated | 29 September 2019 01:25 CEST | Update | - |
| article html file updated | 2 May 2019 10:01 CEST | Update | - |
| article html file updated | 18 April 2019 07:40 CEST | Update | - |
| article html file updated | 2 January 2018 18:31 CET | Update | - |
| article html file updated | 8 December 2017 10:15 CET | Original file | - |
| article xml uploaded. | 8 December 2017 10:14 CET | Original file | https://www.mdpi.com/2071-1050/9/12/2271/xml |
| article pdf uploaded. | 8 December 2017 10:14 CET | Updated version of record | https://www.mdpi.com/2071-1050/9/12/2271/pdf |
| article pdf uploaded. | 7 December 2017 12:05 CET | Version of Record | https://www.mdpi.com/2071-1050/9/12/2271/pdf-vor |
