| article html file updated | 7 February 2020 09:57 CET | Update | https://www.mdpi.com/1996-1944/9/6/457 |
| article html file updated | 5 May 2019 13:22 CEST | Update | N/A |
| article html file updated | 27 March 2019 07:05 CET | Update | N/A |
| article html file updated | 28 June 2016 12:20 CEST | Update | N/A |
| article html file updated | 8 June 2016 12:50 CEST | Original file | N/A |
| article xml uploaded. | 8 June 2016 12:48 CEST | Original file | https://www.mdpi.com/1996-1944/9/6/457/xml |
| article pdf uploaded. | 8 June 2016 12:48 CEST | Version of Record | https://www.mdpi.com/1996-1944/9/6/457/pdf |
