| article html file updated | 7 February 2020 03:17 CET | Update | https://www.mdpi.com/1996-1944/9/1/42 |
| article html file updated | 6 May 2019 02:52 CEST | Update | - |
| article html file updated | 26 March 2019 18:09 CET | Original file | - |
| article pdf uploaded. | 12 January 2016 11:48 CET | Version of Record | https://www.mdpi.com/1996-1944/9/1/42/pdf |
| article xml uploaded. | 12 January 2016 11:48 CET | Original file | https://www.mdpi.com/1996-1944/9/1/42/xml |
