| article html file updated | 31 August 2025 16:07 CEST | Update | https://www.mdpi.com/2304-8158/9/4/404 |
| article html file updated | 21 July 2022 00:36 CEST | Update | - |
| article html file updated | 14 April 2020 06:40 CEST | Original file | - |
| article pdf uploaded. | 14 April 2020 06:39 CEST | Updated version of record | https://www.mdpi.com/2304-8158/9/4/404/pdf |
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| article pdf uploaded. | 1 April 2020 12:47 CEST | Version of Record | https://www.mdpi.com/2304-8158/9/4/404/pdf-vor |
| article xml file uploaded | 1 April 2020 12:47 CEST | Original file | - |
