| article html file updated | 7 February 2020 02:59 CET | Update | https://www.mdpi.com/1996-1944/9/1/23 |
| article html file updated | 6 May 2019 03:27 CEST | Update | - |
| article html file updated | 26 March 2019 17:38 CET | Original file | - |
| article pdf uploaded. | 2 January 2016 10:32 CET | Version of Record | https://www.mdpi.com/1996-1944/9/1/23/pdf |
| article xml uploaded. | 2 January 2016 10:32 CET | Original file | https://www.mdpi.com/1996-1944/9/1/23/xml |
