| article html file updated | 7 February 2020 05:50 CET | Update | https://www.mdpi.com/2313-433X/2/1/9 |
| article html file updated | 5 May 2019 21:36 CEST | Update | N/A |
| article html file updated | 26 March 2019 23:21 CET | Original file | N/A |
| article pdf uploaded. | 14 March 2016 08:28 CET | Version of Record | https://www.mdpi.com/2313-433X/2/1/9/pdf |
| article xml uploaded. | 14 March 2016 08:28 CET | Original file | https://www.mdpi.com/2313-433X/2/1/9/xml |
