| article html file updated | 9 February 2020 06:52 CET | Update | https://www.mdpi.com/2313-433X/4/2/42 |
| article html file updated | 30 September 2019 20:40 CEST | Update | - |
| article html file updated | 1 May 2019 17:57 CEST | Update | - |
| article html file updated | 17 April 2019 17:17 CEST | Update | - |
| article html file updated | 28 March 2019 23:48 CET | Update | - |
| article html file updated | 14 March 2018 11:52 CET | Update | - |
| article html file updated | 23 February 2018 05:04 CET | Original file | - |
| article xml uploaded. | 23 February 2018 05:03 CET | Update | https://www.mdpi.com/2313-433X/4/2/42/xml |
| article xml uploaded. | 23 February 2018 05:03 CET | Original file | - |
| article pdf uploaded. | 23 February 2018 05:03 CET | Updated version of record | https://www.mdpi.com/2313-433X/4/2/42/pdf |
| article pdf uploaded. | 16 February 2018 08:44 CET | Version of Record | https://www.mdpi.com/2313-433X/4/2/42/pdf-vor |
