| article html file updated | 7 February 2020 03:14 CET | Update | https://www.mdpi.com/1996-1944/9/1/34 |
| article html file updated | 6 May 2019 02:58 CEST | Update | - |
| article html file updated | 26 March 2019 18:03 CET | Original file | - |
| article pdf uploaded. | 8 January 2016 15:40 CET | Version of Record | https://www.mdpi.com/1996-1944/9/1/34/pdf |
| article xml uploaded. | 8 January 2016 15:40 CET | Original file | https://www.mdpi.com/1996-1944/9/1/34/xml |
