| article html file updated | 1 September 2025 16:54 CEST | Update | https://www.mdpi.com/1999-4915/13/1/21 |
| article html file updated | 23 July 2022 07:03 CEST | Update | - |
| article html file updated | 25 December 2020 05:42 CET | Update | - |
| article pdf uploaded. | 25 December 2020 05:41 CET | Updated version of record | https://www.mdpi.com/1999-4915/13/1/21/pdf |
| article xml uploaded. | 25 December 2020 05:41 CET | Update | https://www.mdpi.com/1999-4915/13/1/21/xml |
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| article html file updated | 24 December 2020 11:37 CET | Original file | - |
| article pdf uploaded. | 24 December 2020 11:36 CET | Version of Record | https://www.mdpi.com/1999-4915/13/1/21/pdf-vor |
| article xml uploaded. | 24 December 2020 11:36 CET | Update | - |
| article xml file uploaded | 24 December 2020 11:36 CET | Original file | - |
