| article html file updated | 31 August 2025 09:45 CEST | Update | https://www.mdpi.com/1999-5903/12/2/20 |
| article html file updated | 20 July 2022 18:16 CEST | Update | N/A |
| article html file updated | 19 February 2020 11:44 CET | Original file | N/A |
| article pdf uploaded. | 19 February 2020 11:43 CET | Updated version of record | https://www.mdpi.com/1999-5903/12/2/20/pdf |
| article xml uploaded. | 19 February 2020 11:43 CET | Update | https://www.mdpi.com/1999-5903/12/2/20/xml |
| article xml file uploaded | 19 February 2020 11:43 CET | Update | N/A |
| article pdf uploaded. | 22 January 2020 15:36 CET | Version of Record | https://www.mdpi.com/1999-5903/12/2/20/pdf-vor |
| article xml file uploaded | 22 January 2020 15:36 CET | Original file | N/A |
