| article html file updated | 7 February 2020 09:58 CET | Update | https://www.mdpi.com/1996-1944/9/6/459 |
| article html file updated | 5 May 2019 13:19 CEST | Update | - |
| article html file updated | 27 March 2019 07:07 CET | Update | - |
| article html file updated | 28 June 2016 12:21 CEST | Update | - |
| article html file updated | 14 June 2016 22:35 CEST | Original file | - |
| article xml uploaded. | 13 June 2016 15:05 CEST | Original file | https://www.mdpi.com/1996-1944/9/6/459/xml |
| article pdf uploaded. | 13 June 2016 15:05 CEST | Version of Record | https://www.mdpi.com/1996-1944/9/6/459/pdf |
