| article html file updated | 8 February 2020 02:58 CET | Update | https://www.mdpi.com/2071-1050/9/4/547 |
| article html file updated | 4 May 2019 03:25 CEST | Update | - |
| article html file updated | 28 April 2017 10:54 CEST | Update | - |
| article html file updated | 6 April 2017 11:19 CEST | Original file | - |
| article xml uploaded. | 6 April 2017 11:17 CEST | Original file | https://www.mdpi.com/2071-1050/9/4/547/xml |
| article pdf uploaded. | 6 April 2017 11:17 CEST | Updated version of record | https://www.mdpi.com/2071-1050/9/4/547/pdf |
| article pdf uploaded. | 5 April 2017 14:38 CEST | Version of Record | https://www.mdpi.com/2071-1050/9/4/547/pdf-vor |
