| article html file updated | 7 February 2020 05:19 CET | Update | https://www.mdpi.com/2218-1989/6/1/10 |
| article html file updated | 5 May 2019 22:40 CEST | Update | - |
| article html file updated | 26 March 2019 22:20 CET | Update | - |
| article html file updated | 30 March 2016 07:56 CEST | Original file | - |
| article pdf uploaded. | 2 March 2016 10:51 CET | Version of Record | https://www.mdpi.com/2218-1989/6/1/10/pdf |
| article xml uploaded. | 2 March 2016 10:51 CET | Original file | https://www.mdpi.com/2218-1989/6/1/10/xml |
