| article html file updated | 8 February 2020 23:00 CET | Update | https://www.mdpi.com/2313-433X/3/4/57 |
| article html file updated | 28 September 2019 23:05 CEST | Update | - |
| article html file updated | 2 May 2019 10:55 CEST | Update | - |
| article html file updated | 18 April 2019 08:32 CEST | Update | - |
| article html file updated | 6 February 2018 10:42 CET | Update | - |
| article html file updated | 4 December 2017 11:57 CET | Original file | - |
| article xml uploaded. | 4 December 2017 11:56 CET | Update | https://www.mdpi.com/2313-433X/3/4/57/xml |
| article xml uploaded. | 4 December 2017 11:56 CET | Original file | - |
| article pdf uploaded. | 4 December 2017 11:56 CET | Version of Record | https://www.mdpi.com/2313-433X/3/4/57/pdf |
