| article html file updated | 7 February 2020 19:17 CET | Update | https://www.mdpi.com/1996-1944/9/12/994 |
| article html file updated | 22 September 2019 09:37 CEST | Update | - |
| article html file updated | 4 May 2019 19:56 CEST | Update | - |
| article html file updated | 28 December 2016 10:42 CET | Update | - |
| article html file updated | 8 December 2016 12:38 CET | Original file | - |
| article xml uploaded. | 8 December 2016 12:36 CET | Update | https://www.mdpi.com/1996-1944/9/12/994/xml |
| article xml uploaded. | 8 December 2016 12:36 CET | Original file | - |
| article pdf uploaded. | 8 December 2016 12:36 CET | Version of Record | https://www.mdpi.com/1996-1944/9/12/994/pdf |
