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| article pdf uploaded. | 22 March 2017 11:05 CET | Updated version of record | https://www.mdpi.com/2073-4425/8/3/105/pdf |
| article pdf uploaded. | 20 March 2017 11:58 CET | Version of Record | https://www.mdpi.com/2073-4425/8/3/105/pdf-vor |