| article html file updated | 7 February 2020 06:24 CET | Update | https://www.mdpi.com/1996-1944/9/4/237 |
| article html file updated | 5 May 2019 20:26 CEST | Update | - |
| article html file updated | 27 March 2019 00:20 CET | Update | - |
| article html file updated | 28 April 2016 10:44 CEST | Update | - |
| article html file updated | 25 March 2016 11:16 CET | Original file | - |
| article xml uploaded. | 25 March 2016 11:15 CET | Original file | https://www.mdpi.com/1996-1944/9/4/237/xml |
| article pdf uploaded. | 25 March 2016 11:15 CET | Version of Record | https://www.mdpi.com/1996-1944/9/4/237/pdf |
