| article html file updated | 31 August 2025 03:44 CEST | Update | https://www.mdpi.com/2227-9067/6/11/120 |
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| article pdf uploaded. | 30 October 2019 08:48 CET | Version of Record | https://www.mdpi.com/2227-9067/6/11/120/pdf |
| article xml uploaded. | 30 October 2019 08:48 CET | Update | https://www.mdpi.com/2227-9067/6/11/120/xml |
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