| article html file updated | 8 February 2020 03:31 CET | Update | https://www.mdpi.com/2071-1050/9/4/600 |
| article html file updated | 24 September 2019 07:21 CEST | Update | - |
| article html file updated | 4 May 2019 02:20 CEST | Update | - |
| article html file updated | 28 April 2017 11:02 CEST | Update | - |
| article html file updated | 18 April 2017 11:18 CEST | Original file | - |
| article xml uploaded. | 18 April 2017 11:17 CEST | Original file | https://www.mdpi.com/2071-1050/9/4/600/xml |
| article pdf uploaded. | 18 April 2017 11:17 CEST | Updated version of record | https://www.mdpi.com/2071-1050/9/4/600/pdf |
| article pdf uploaded. | 13 April 2017 15:20 CEST | Version of Record | https://www.mdpi.com/2071-1050/9/4/600/pdf-vor |
