| article html file updated | 7 February 2020 19:13 CET | Update | https://www.mdpi.com/1996-1944/9/12/990 |
| article html file updated | 22 September 2019 09:19 CEST | Update | - |
| article html file updated | 4 May 2019 20:04 CEST | Update | - |
| article html file updated | 28 December 2016 10:39 CET | Update | - |
| article html file updated | 7 December 2016 16:27 CET | Original file | - |
| article xml uploaded. | 7 December 2016 16:26 CET | Original file | https://www.mdpi.com/1996-1944/9/12/990/xml |
| article pdf uploaded. | 7 December 2016 16:26 CET | Version of Record | https://www.mdpi.com/1996-1944/9/12/990/pdf |
