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| article pdf uploaded. | 15 December 2014 14:24 CET | Updated version of record | https://www.mdpi.com/2072-6643/6/12/5679/pdf |
| article pdf uploaded. | 10 December 2014 11:04 CET | Version of Record | https://www.mdpi.com/2072-6643/6/12/5679/pdf-vor |
