| article html file updated | 9 February 2020 06:00 CET | Update | https://www.mdpi.com/2313-433X/4/2/37 |
| article html file updated | 30 September 2019 15:38 CEST | Update | - |
| article html file updated | 1 May 2019 19:52 CEST | Update | - |
| article html file updated | 17 April 2019 18:59 CEST | Update | - |
| article html file updated | 28 March 2019 21:59 CET | Update | - |
| article html file updated | 14 March 2018 11:48 CET | Update | - |
| article html file updated | 8 February 2018 16:38 CET | Original file | - |
| article xml uploaded. | 8 February 2018 16:37 CET | Original file | https://www.mdpi.com/2313-433X/4/2/37/xml |
| article pdf uploaded. | 8 February 2018 16:37 CET | Version of Record | https://www.mdpi.com/2313-433X/4/2/37/pdf |
