| article html file updated | 9 February 2020 02:52 CET | Update | https://www.mdpi.com/2313-433X/4/1/21 |
| article html file updated | 29 September 2019 20:56 CEST | Update | N/A |
| article html file updated | 2 May 2019 02:37 CEST | Update | N/A |
| article html file updated | 18 April 2019 00:51 CEST | Update | N/A |
| article html file updated | 28 March 2019 15:08 CET | Update | N/A |
| article html file updated | 2 February 2018 09:16 CET | Update | N/A |
| article html file updated | 12 January 2018 15:18 CET | Original file | N/A |
| article xml uploaded. | 12 January 2018 15:16 CET | Original file | https://www.mdpi.com/2313-433X/4/1/21/xml |
| article pdf uploaded. | 12 January 2018 15:16 CET | Version of Record | https://www.mdpi.com/2313-433X/4/1/21/pdf |
