| article html file updated | 8 February 2020 22:07 CET | Update | https://www.mdpi.com/2504-4494/1/2/21 |
| article html file updated | 28 September 2019 17:33 CEST | Update | N/A |
| article html file updated | 2 May 2019 12:55 CEST | Update | N/A |
| article html file updated | 18 April 2019 10:33 CEST | Update | N/A |
| article html file updated | 24 November 2017 12:28 CET | Original file | N/A |
| article xml uploaded. | 24 November 2017 12:26 CET | Original file | https://www.mdpi.com/2504-4494/1/2/21/xml |
| article pdf uploaded. | 24 November 2017 12:26 CET | Version of Record | https://www.mdpi.com/2504-4494/1/2/21/pdf |
