| article html file updated | 7 February 2020 04:37 CET | Update | https://www.mdpi.com/2313-433X/2/1/8 |
| article html file updated | 6 May 2019 00:13 CEST | Update | N/A |
| article html file updated | 26 March 2019 20:51 CET | Original file | N/A |
| article pdf uploaded. | 16 February 2016 11:22 CET | Version of Record | https://www.mdpi.com/2313-433X/2/1/8/pdf |
| article xml uploaded. | 16 February 2016 11:22 CET | Original file | https://www.mdpi.com/2313-433X/2/1/8/xml |
