| article html file updated | 8 February 2020 18:06 CET | Update | https://www.mdpi.com/2313-433X/3/4/44 |
| article html file updated | 2 May 2019 22:04 CEST | Update | N/A |
| article html file updated | 6 February 2018 10:44 CET | Update | N/A |
| article html file updated | 15 October 2017 22:47 CEST | Original file | N/A |
| article xml uploaded. | 13 October 2017 06:15 CEST | Update | https://www.mdpi.com/2313-433X/3/4/44/xml |
| article xml uploaded. | 13 October 2017 06:15 CEST | Original file | N/A |
| article pdf uploaded. | 13 October 2017 06:15 CEST | Updated version of record | https://www.mdpi.com/2313-433X/3/4/44/pdf |
| article pdf uploaded. | 11 October 2017 12:25 CEST | Version of Record | https://www.mdpi.com/2313-433X/3/4/44/pdf-vor |
