| article html file updated | 30 August 2025 07:34 CEST | Update | https://www.mdpi.com/2076-0752/7/4/61 |
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| article pdf uploaded. | 8 October 2018 07:00 CEST | Version of Record | https://www.mdpi.com/2076-0752/7/4/61/pdf |
| article xml uploaded. | 8 October 2018 07:00 CEST | Update | https://www.mdpi.com/2076-0752/7/4/61/xml |
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