| article html file updated | 8 February 2020 07:41 CET | Update | https://www.mdpi.com/2313-433X/3/2/20 |
| article html file updated | 25 September 2019 05:22 CEST | Update | - |
| article html file updated | 3 May 2019 18:35 CEST | Update | - |
| article html file updated | 8 June 2017 13:09 CEST | Original file | - |
| article xml uploaded. | 8 June 2017 13:07 CEST | Update | https://www.mdpi.com/2313-433X/3/2/20/xml |
| article pdf uploaded. | 8 June 2017 13:07 CEST | Updated version of record | https://www.mdpi.com/2313-433X/3/2/20/pdf |
| article pdf uploaded. | 7 June 2017 12:21 CEST | Version of Record | https://www.mdpi.com/2313-433X/3/2/20/pdf-vor |
