| article html file updated | 9 February 2020 05:05 CET | Update | https://www.mdpi.com/2313-433X/4/2/32 |
| article html file updated | 30 September 2019 09:56 CEST | Update | - |
| article html file updated | 1 May 2019 21:57 CEST | Update | - |
| article html file updated | 17 April 2019 20:44 CEST | Update | - |
| article html file updated | 28 March 2019 19:59 CET | Update | - |
| article html file updated | 14 March 2018 11:45 CET | Update | - |
| article html file updated | 12 February 2018 05:31 CET | Original file | - |
| article xml uploaded. | 12 February 2018 05:30 CET | Update | https://www.mdpi.com/2313-433X/4/2/32/xml |
| article xml uploaded. | 12 February 2018 05:30 CET | Update | - |
| article xml uploaded. | 12 February 2018 05:30 CET | Original file | - |
| article pdf uploaded. | 12 February 2018 05:30 CET | Updated version of record | https://www.mdpi.com/2313-433X/4/2/32/pdf |
| article pdf uploaded. | 31 January 2018 17:32 CET | Version of Record | https://www.mdpi.com/2313-433X/4/2/32/pdf-vor |
