| article html file updated | 6 February 2020 13:20 CET | Update | https://www.mdpi.com/1999-4893/7/4/608 |
| article html file updated | 7 May 2019 06:07 CEST | Update | - |
| article html file updated | 25 March 2019 16:59 CET | Update | - |
| article html file updated | 18 July 2017 10:21 CEST | Update | - |
| article html file updated | 18 July 2017 10:20 CEST | Update | - |
| article html file updated | 18 July 2017 10:19 CEST | Original file | - |
| article xml uploaded. | 18 July 2017 10:18 CEST | Update | https://www.mdpi.com/1999-4893/7/4/608/xml |
| article pdf uploaded. | 3 November 2014 14:01 CET | Version of Record | https://www.mdpi.com/1999-4893/7/4/608/pdf |
