| article html file updated | 7 February 2020 11:01 CET | Update | https://www.mdpi.com/1996-1073/9/7/507 |
| article html file updated | 5 May 2019 11:23 CEST | Update | - |
| article html file updated | 27 March 2019 09:00 CET | Update | - |
| article html file updated | 27 July 2016 09:40 CEST | Update | - |
| article html file updated | 30 June 2016 14:23 CEST | Original file | - |
| article xml uploaded. | 30 June 2016 14:21 CEST | Update | https://www.mdpi.com/1996-1073/9/7/507/xml |
| article pdf uploaded. | 30 June 2016 14:21 CEST | Version of Record | https://www.mdpi.com/1996-1073/9/7/507/pdf |
