| article html file updated | 30 August 2025 07:35 CEST | Update | https://www.mdpi.com/2227-9091/6/4/112 |
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| article pdf uploaded. | 8 October 2018 13:31 CEST | Version of Record | https://www.mdpi.com/2227-9091/6/4/112/pdf |
| article xml uploaded. | 8 October 2018 13:31 CEST | Update | https://www.mdpi.com/2227-9091/6/4/112/xml |
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