| article html file updated | 7 February 2020 16:06 CET | Update | https://www.mdpi.com/2411-5134/1/4/20 |
| article html file updated | 5 May 2019 02:05 CEST | Update | - |
| article html file updated | 10 October 2016 10:31 CEST | Original file | - |
| article xml uploaded. | 10 October 2016 10:29 CEST | Update | https://www.mdpi.com/2411-5134/1/4/20/xml |
| article xml uploaded. | 10 October 2016 10:29 CEST | Original file | - |
| article pdf uploaded. | 10 October 2016 10:29 CEST | Version of Record | https://www.mdpi.com/2411-5134/1/4/20/pdf |
