| article html file updated | 7 February 2020 11:02 CET | Update | https://www.mdpi.com/2218-2004/4/3/20 |
| article html file updated | 5 May 2019 11:22 CEST | Update | - |
| article html file updated | 27 March 2019 09:02 CET | Update | - |
| article html file updated | 28 September 2016 22:49 CEST | Update | - |
| article html file updated | 30 June 2016 14:57 CEST | Original file | - |
| article xml uploaded. | 30 June 2016 14:55 CEST | Update | https://www.mdpi.com/2218-2004/4/3/20/xml |
| article pdf uploaded. | 30 June 2016 14:55 CEST | Version of Record | https://www.mdpi.com/2218-2004/4/3/20/pdf |
