| article html file updated | 8 February 2020 21:48 CET | Update | https://www.mdpi.com/2313-433X/3/4/52 |
| article html file updated | 2 May 2019 13:38 CEST | Update | - |
| article html file updated | 18 April 2019 11:18 CEST | Update | - |
| article html file updated | 6 February 2018 10:41 CET | Update | - |
| article html file updated | 22 November 2017 03:52 CET | Original file | - |
| article xml uploaded. | 22 November 2017 03:51 CET | Update | https://www.mdpi.com/2313-433X/3/4/52/xml |
| article xml uploaded. | 22 November 2017 03:51 CET | Original file | - |
| article pdf uploaded. | 22 November 2017 03:51 CET | Updated version of record | https://www.mdpi.com/2313-433X/3/4/52/pdf |
| article pdf uploaded. | 21 November 2017 10:55 CET | Version of Record | https://www.mdpi.com/2313-433X/3/4/52/pdf-vor |
