| article html file updated | 8 February 2020 02:34 CET | Update | https://www.mdpi.com/2071-1050/9/4/523 |
| article html file updated | 24 September 2019 02:07 CEST | Update | - |
| article html file updated | 4 May 2019 04:19 CEST | Update | - |
| article html file updated | 28 April 2017 10:49 CEST | Update | - |
| article html file updated | 31 March 2017 12:24 CEST | Original file | - |
| article xml uploaded. | 31 March 2017 12:22 CEST | Update | https://www.mdpi.com/2071-1050/9/4/523/xml |
| article pdf uploaded. | 31 March 2017 12:22 CEST | Updated version of record | https://www.mdpi.com/2071-1050/9/4/523/pdf |
| article pdf uploaded. | 30 March 2017 14:45 CEST | Version of Record | https://www.mdpi.com/2071-1050/9/4/523/pdf-vor |
