| article html file updated | 7 February 2020 11:07 CET | Update | https://new.mdpi.com/1996-1073/9/7/509 |
| article html file updated | 5 May 2019 11:12 CEST | Update | - |
| article html file updated | 27 March 2019 09:12 CET | Update | - |
| article html file updated | 27 July 2016 09:42 CEST | Update | - |
| article html file updated | 1 July 2016 11:49 CEST | Original file | - |
| article xml uploaded. | 1 July 2016 10:44 CEST | Update | https://new.mdpi.com/1996-1073/9/7/509/xml |
| article pdf uploaded. | 1 July 2016 10:44 CEST | Version of Record | https://new.mdpi.com/1996-1073/9/7/509/pdf |
