| article html file updated | 12 August 2026 19:37 CEST | Update | https://www.mdpi.com/2071-1050/5/7/2991 |
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| article pdf uploaded. | 18 July 2013 10:53 CEST | Updated version of record | https://www.mdpi.com/2071-1050/5/7/2991/pdf |
| article pdf uploaded. | 10 July 2013 10:40 CEST | Version of Record | https://www.mdpi.com/2071-1050/5/7/2991/pdf-vor |
