| article html file updated | 14 August 2026 18:16 CEST | Update | https://www.mdpi.com/2227-9067/4/10/87 |
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| article pdf uploaded. | 16 October 2017 15:05 CEST | Updated version of record | https://www.mdpi.com/2227-9067/4/10/87/pdf |
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| article pdf uploaded. | 16 October 2017 15:04 CEST | Updated version of record | https://www.mdpi.com/2227-9067/4/10/87/pdf-vor |
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| article pdf uploaded. | 16 October 2017 15:03 CEST | Updated version of record | https://www.mdpi.com/2227-9067/4/10/87/pdf-vor |
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