| article html file updated | 7 February 2020 07:35 CET | Update | https://www.mdpi.com/1996-1944/9/4/300 |
| article html file updated | 5 May 2019 18:00 CEST | Update | - |
| article html file updated | 27 March 2019 02:31 CET | Update | - |
| article html file updated | 28 April 2016 11:14 CEST | Update | - |
| article html file updated | 20 April 2016 16:18 CEST | Original file | - |
| article xml uploaded. | 20 April 2016 16:17 CEST | Original file | https://www.mdpi.com/1996-1944/9/4/300/xml |
| article pdf uploaded. | 20 April 2016 16:17 CEST | Version of Record | https://www.mdpi.com/1996-1944/9/4/300/pdf |
