| article html file updated | 7 February 2020 11:39 CET | Update | https://www.mdpi.com/1996-1073/9/7/539 |
| article html file updated | 5 May 2019 10:13 CEST | Update | - |
| article html file updated | 27 March 2019 10:12 CET | Update | - |
| article html file updated | 27 July 2016 09:59 CEST | Update | - |
| article html file updated | 14 July 2016 07:54 CEST | Original file | - |
| article xml uploaded. | 14 July 2016 07:53 CEST | Update | https://www.mdpi.com/1996-1073/9/7/539/xml |
| article pdf uploaded. | 14 July 2016 07:53 CEST | Version of Record | https://www.mdpi.com/1996-1073/9/7/539/pdf |
