| article html file updated | 30 August 2025 07:59 CEST | Update | https://www.mdpi.com/2306-5338/5/4/60 |
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| article pdf uploaded. | 19 October 2018 13:33 CEST | Version of Record | https://www.mdpi.com/2306-5338/5/4/60/pdf |
| article xml uploaded. | 19 October 2018 13:33 CEST | Update | https://www.mdpi.com/2306-5338/5/4/60/xml |
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