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| article html file updated | 30 August 2025 02:43 CEST | Update | N/A |
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| article html file updated | 25 February 2018 03:41 CET | Original file | N/A |
| article xml uploaded. | 25 February 2018 03:39 CET | Update | https://www.mdpi.com/1999-4907/9/2/97/xml |
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| article pdf uploaded. | 25 February 2018 03:39 CET | Updated version of record | https://www.mdpi.com/1999-4907/9/2/97/pdf |
| article pdf uploaded. | 24 February 2018 11:21 CET | Version of Record | https://www.mdpi.com/1999-4907/9/2/97/pdf-vor |
