| article html file updated | 8 February 2020 19:20 CET | Update | https://www.mdpi.com/2218-1989/7/4/54 |
| article html file updated | 27 September 2019 23:34 CEST | Update | - |
| article html file updated | 2 May 2019 19:15 CEST | Update | - |
| article html file updated | 2 January 2018 20:24 CET | Update | - |
| article html file updated | 24 October 2017 13:11 CEST | Original file | - |
| article xml uploaded. | 24 October 2017 13:10 CEST | Original file | https://www.mdpi.com/2218-1989/7/4/54/xml |
| article pdf uploaded. | 24 October 2017 13:10 CEST | Version of Record | https://www.mdpi.com/2218-1989/7/4/54/pdf |
