| article html file updated | 8 February 2020 19:17 CET | Update | https://www.mdpi.com/2313-4321/2/4/19 |
| article html file updated | 27 September 2019 23:14 CEST | Update | N/A |
| article html file updated | 2 May 2019 19:23 CEST | Update | N/A |
| article html file updated | 25 October 2017 05:19 CEST | Original file | N/A |
| article xml uploaded. | 25 October 2017 05:18 CEST | Original file | https://www.mdpi.com/2313-4321/2/4/19/xml |
| article pdf uploaded. | 25 October 2017 05:18 CEST | Updated version of record | https://www.mdpi.com/2313-4321/2/4/19/pdf |
| article pdf uploaded. | 24 October 2017 10:57 CEST | Version of Record | https://www.mdpi.com/2313-4321/2/4/19/pdf-vor |
