| article html file updated | 8 February 2020 02:52 CET | Update | https://www.mdpi.com/2071-1050/9/4/546 |
| article html file updated | 24 September 2019 03:48 CEST | Update | - |
| article html file updated | 4 May 2019 03:41 CEST | Update | - |
| article html file updated | 28 April 2017 10:54 CEST | Update | - |
| article html file updated | 6 April 2017 11:16 CEST | Original file | - |
| article xml uploaded. | 6 April 2017 11:15 CEST | Original file | https://www.mdpi.com/2071-1050/9/4/546/xml |
| article pdf uploaded. | 6 April 2017 11:15 CEST | Updated version of record | https://www.mdpi.com/2071-1050/9/4/546/pdf |
| article pdf uploaded. | 4 April 2017 15:21 CEST | Version of Record | https://www.mdpi.com/2071-1050/9/4/546/pdf-vor |
