| article html file updated | 8 February 2020 04:11 CET | Update | https://www.mdpi.com/2071-1050/9/4/668 |
| article html file updated | 24 September 2019 11:12 CEST | Update | - |
| article html file updated | 4 May 2019 01:06 CEST | Update | - |
| article html file updated | 28 April 2017 11:12 CEST | Update | - |
| article html file updated | 24 April 2017 13:20 CEST | Original file | - |
| article xml uploaded. | 24 April 2017 13:19 CEST | Original file | https://www.mdpi.com/2071-1050/9/4/668/xml |
| article pdf uploaded. | 24 April 2017 13:19 CEST | Updated version of record | https://www.mdpi.com/2071-1050/9/4/668/pdf |
| article pdf uploaded. | 22 April 2017 11:49 CEST | Version of Record | https://www.mdpi.com/2071-1050/9/4/668/pdf-vor |
