| article html file updated | 8 February 2020 23:48 CET | Update | https://www.mdpi.com/2079-7737/6/4/43 |
| article html file updated | 2 May 2019 09:10 CEST | Update | - |
| article html file updated | 18 April 2019 06:54 CEST | Update | - |
| article html file updated | 2 January 2018 20:31 CET | Update | - |
| article html file updated | 12 December 2017 06:39 CET | Original file | - |
| article xml uploaded. | 12 December 2017 06:38 CET | Original file | https://www.mdpi.com/2079-7737/6/4/43/xml |
| article pdf uploaded. | 12 December 2017 06:38 CET | Version of Record | https://www.mdpi.com/2079-7737/6/4/43/pdf |
