| article html file updated | 17 August 2026 08:56 CEST | Update | https://www.mdpi.com/2227-9040/8/2/28 |
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| article html file updated | 25 April 2020 11:06 CEST | Original file | N/A |
| article pdf uploaded. | 25 April 2020 11:05 CEST | Updated version of record | https://www.mdpi.com/2227-9040/8/2/28/pdf |
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| article pdf uploaded. | 15 April 2020 11:47 CEST | Version of Record | https://www.mdpi.com/2227-9040/8/2/28/pdf-vor |
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