| article html file updated | 1 September 2025 17:27 CEST | Update | https://www.mdpi.com/2413-8851/5/1/6 |
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| article pdf uploaded. | 31 December 2020 09:09 CET | Updated version of record | https://www.mdpi.com/2413-8851/5/1/6/pdf |
| article xml uploaded. | 31 December 2020 09:09 CET | Update | https://www.mdpi.com/2413-8851/5/1/6/xml |
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| article html file updated | 31 December 2020 08:44 CET | Original file | - |
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