| article html file updated | 7 February 2020 21:46 CET | Update | https://www.mdpi.com/2313-433X/3/1/6 |
| article html file updated | 22 September 2019 23:03 CEST | Update | - |
| article html file updated | 4 May 2019 14:33 CEST | Update | - |
| article html file updated | 19 January 2017 08:57 CET | Original file | - |
| article xml uploaded. | 19 January 2017 08:56 CET | Original file | https://www.mdpi.com/2313-433X/3/1/6/xml |
| article pdf uploaded. | 19 January 2017 08:56 CET | Version of Record | https://www.mdpi.com/2313-433X/3/1/6/pdf |
