| article html file updated | 7 February 2020 18:49 CET | Update | https://www.mdpi.com/1996-1073/9/12/1012 |
| article html file updated | 22 September 2019 07:46 CEST | Update | - |
| article html file updated | 4 May 2019 20:55 CEST | Update | - |
| article html file updated | 28 December 2016 08:56 CET | Update | - |
| article html file updated | 30 November 2016 08:57 CET | Original file | - |
| article xml uploaded. | 30 November 2016 08:55 CET | Update | https://www.mdpi.com/1996-1073/9/12/1012/xml |
| article xml uploaded. | 30 November 2016 08:55 CET | Original file | - |
| article pdf uploaded. | 30 November 2016 08:55 CET | Version of Record | https://www.mdpi.com/1996-1073/9/12/1012/pdf |
