| article html file updated | 31 August 2025 11:31 CEST | Update | https://www.mdpi.com/2075-4663/8/2/21 |
| article html file updated | 20 July 2022 20:02 CEST | Update | N/A |
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| article pdf uploaded. | 13 February 2020 09:27 CET | Version of Record | https://www.mdpi.com/2075-4663/8/2/21/pdf |
| article xml uploaded. | 13 February 2020 09:27 CET | Update | https://www.mdpi.com/2075-4663/8/2/21/xml |
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