| article html file updated | 2 September 2025 01:41 CEST | Update | https://www.mdpi.com/2218-2004/9/2/20 |
| article html file updated | 25 July 2022 09:11 CEST | Update | - |
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| article pdf uploaded. | 30 March 2021 11:21 CEST | Updated version of record | https://www.mdpi.com/2218-2004/9/2/20/pdf |
| article xml uploaded. | 30 March 2021 11:21 CEST | Update | https://www.mdpi.com/2218-2004/9/2/20/xml |
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| article html file updated | 26 March 2021 04:35 CET | Update | - |
| article pdf uploaded. | 26 March 2021 04:33 CET | Updated version of record | https://www.mdpi.com/2218-2004/9/2/20/pdf-vor |
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| article html file updated | 25 March 2021 09:11 CET | Original file | - |
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| article xml file uploaded | 25 March 2021 09:09 CET | Original file | - |
