| article html file updated | 31 August 2025 07:02 CEST | Update | https://www.mdpi.com/2309-608X/6/1/4 |
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| article pdf uploaded. | 20 December 2019 07:50 CET | Version of Record | https://www.mdpi.com/2309-608X/6/1/4/pdf |
| article xml uploaded. | 20 December 2019 07:50 CET | Update | https://www.mdpi.com/2309-608X/6/1/4/xml |
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