| article html file updated | 8 February 2020 22:19 CET | Update | https://www.mdpi.com/2218-6581/6/4/33 |
| article html file updated | 2 May 2019 12:30 CEST | Update | - |
| article html file updated | 18 April 2019 10:07 CEST | Update | - |
| article html file updated | 2 January 2018 10:45 CET | Update | - |
| article html file updated | 27 November 2017 09:09 CET | Original file | - |
| article xml uploaded. | 27 November 2017 09:07 CET | Update | https://www.mdpi.com/2218-6581/6/4/33/xml |
| article xml uploaded. | 27 November 2017 09:07 CET | Original file | - |
| article pdf uploaded. | 27 November 2017 09:07 CET | Version of Record | https://www.mdpi.com/2218-6581/6/4/33/pdf |
