| article html file updated | 30 August 2025 20:33 CEST | Update | https://www.mdpi.com/2079-9292/8/6/613 |
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| article pdf uploaded. | 31 May 2019 11:59 CEST | Version of Record | https://www.mdpi.com/2079-9292/8/6/613/pdf |
| article xml uploaded. | 31 May 2019 11:59 CEST | Update | https://www.mdpi.com/2079-9292/8/6/613/xml |
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