| article html file updated | 7 February 2020 11:53 CET | Update | https://www.mdpi.com/1996-1073/9/7/557 |
| article html file updated | 5 May 2019 09:48 CEST | Update | - |
| article html file updated | 27 March 2019 10:39 CET | Update | - |
| article html file updated | 27 July 2016 10:01 CEST | Update | - |
| article html file updated | 19 July 2016 08:03 CEST | Original file | - |
| article xml uploaded. | 19 July 2016 08:01 CEST | Original file | https://www.mdpi.com/1996-1073/9/7/557/xml |
| article pdf uploaded. | 19 July 2016 08:01 CEST | Version of Record | https://www.mdpi.com/1996-1073/9/7/557/pdf |
