| article html file updated | 31 August 2025 17:23 CEST | Update | https://www.mdpi.com/2311-5629/6/2/23 |
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| article pdf uploaded. | 14 April 2020 14:52 CEST | Updated version of record | https://www.mdpi.com/2311-5629/6/2/23/pdf |
| article xml uploaded. | 14 April 2020 14:52 CEST | Update | https://www.mdpi.com/2311-5629/6/2/23/xml |
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