| article html file updated | 9 February 2020 04:25 CET | Update | https://www.mdpi.com/2411-5134/3/1/9 |
| article html file updated | 30 September 2019 05:56 CEST | Update | - |
| article html file updated | 1 May 2019 23:24 CEST | Update | - |
| article html file updated | 17 April 2019 22:00 CEST | Update | - |
| article html file updated | 28 March 2019 18:31 CET | Update | - |
| article html file updated | 26 January 2018 09:09 CET | Original file | - |
| article xml uploaded. | 26 January 2018 09:08 CET | Update | https://www.mdpi.com/2411-5134/3/1/9/xml |
| article xml uploaded. | 26 January 2018 09:08 CET | Original file | - |
| article pdf uploaded. | 26 January 2018 09:08 CET | Version of Record | https://www.mdpi.com/2411-5134/3/1/9/pdf |
