| article html file updated | 7 February 2020 06:25 CET | Update | https://www.mdpi.com/1996-1944/9/4/234 |
| article html file updated | 5 May 2019 20:24 CEST | Update | N/A |
| article html file updated | 27 March 2019 00:20 CET | Update | N/A |
| article html file updated | 28 April 2016 10:43 CEST | Update | N/A |
| article html file updated | 25 March 2016 10:37 CET | Original file | N/A |
| article xml uploaded. | 25 March 2016 10:36 CET | Update | https://www.mdpi.com/1996-1944/9/4/234/xml |
| article pdf uploaded. | 25 March 2016 10:36 CET | Version of Record | https://www.mdpi.com/1996-1944/9/4/234/pdf |
