| article html file updated | 9 February 2020 06:36 CET | Update | https://www.mdpi.com/2313-433X/4/2/41 |
| article html file updated | 30 September 2019 19:12 CEST | Update | N/A |
| article html file updated | 1 May 2019 18:30 CEST | Update | N/A |
| article html file updated | 17 April 2019 17:48 CEST | Update | N/A |
| article html file updated | 28 March 2019 23:16 CET | Update | N/A |
| article html file updated | 14 March 2018 11:52 CET | Update | N/A |
| article html file updated | 13 February 2018 19:22 CET | Original file | N/A |
| article xml uploaded. | 13 February 2018 19:21 CET | Original file | https://www.mdpi.com/2313-433X/4/2/41/xml |
| article pdf uploaded. | 13 February 2018 19:21 CET | Version of Record | https://www.mdpi.com/2313-433X/4/2/41/pdf |
