| article html file updated | 7 February 2020 22:50 CET | Update | https://www.mdpi.com/2313-433X/3/1/9 |
| article html file updated | 23 September 2019 04:53 CEST | Update | - |
| article html file updated | 4 May 2019 12:22 CEST | Update | - |
| article html file updated | 8 February 2017 11:22 CET | Original file | - |
| article xml uploaded. | 8 February 2017 11:02 CET | Original file | https://www.mdpi.com/2313-433X/3/1/9/xml |
| article pdf uploaded. | 8 February 2017 11:02 CET | Version of Record | https://www.mdpi.com/2313-433X/3/1/9/pdf |
