| article html file updated | 31 August 2025 03:52 CEST | Update | https://www.mdpi.com/2079-9284/6/4/64 |
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| article html file updated | 14 February 2020 05:50 CET | Update | - |
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| article pdf uploaded. | 16 November 2019 02:42 CET | Updated version of record | https://www.mdpi.com/2079-9284/6/4/64/pdf |
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| article pdf uploaded. | 1 November 2019 10:00 CET | Version of Record | https://www.mdpi.com/2079-9284/6/4/64/pdf-vor |
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