| article html file updated | 7 February 2020 10:33 CET | Update | https://www.mdpi.com/1996-1073/9/6/477 |
| article html file updated | 5 May 2019 12:12 CEST | Update | - |
| article html file updated | 27 March 2019 08:10 CET | Update | - |
| article html file updated | 29 June 2017 13:29 CEST | Update | - |
| article html file updated | 28 June 2016 09:37 CEST | Update | - |
| article html file updated | 22 June 2016 15:50 CEST | Original file | - |
| article xml uploaded. | 22 June 2016 15:49 CEST | Update | https://www.mdpi.com/1996-1073/9/6/477/xml |
| article pdf uploaded. | 22 June 2016 15:49 CEST | Version of Record | https://www.mdpi.com/1996-1073/9/6/477/pdf |
