| article html file updated | 7 February 2020 21:12 CET | Update | https://www.mdpi.com/2313-433X/3/1/4 |
| article html file updated | 22 September 2019 20:00 CEST | Update | - |
| article html file updated | 4 May 2019 15:54 CEST | Update | - |
| article html file updated | 11 January 2017 16:28 CET | Original file | - |
| article xml uploaded. | 11 January 2017 16:26 CET | Update | https://www.mdpi.com/2313-433X/3/1/4/xml |
| article xml uploaded. | 11 January 2017 16:26 CET | Original file | - |
| article pdf uploaded. | 11 January 2017 16:26 CET | Version of Record | https://www.mdpi.com/2313-433X/3/1/4/pdf |
