| article html file updated | 7 February 2020 06:32 CET | Update | https://www.mdpi.com/1996-1944/9/4/239 |
| article html file updated | 5 May 2019 20:10 CEST | Update | - |
| article html file updated | 27 March 2019 00:32 CET | Update | - |
| article html file updated | 28 April 2016 10:45 CEST | Update | - |
| article html file updated | 29 March 2016 09:27 CEST | Original file | - |
| article xml uploaded. | 29 March 2016 09:26 CEST | Original file | https://www.mdpi.com/1996-1944/9/4/239/xml |
| article pdf uploaded. | 29 March 2016 09:26 CEST | Version of Record | https://www.mdpi.com/1996-1944/9/4/239/pdf |
