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| article xml uploaded. | 25 November 2017 11:41 CET | Original file | https://www.mdpi.com/1422-0067/18/12/2509/xml |
| article pdf uploaded. | 25 November 2017 11:41 CET | Updated version of record | https://www.mdpi.com/1422-0067/18/12/2509/pdf |
| article pdf uploaded. | 23 November 2017 14:18 CET | Version of Record | https://www.mdpi.com/1422-0067/18/12/2509/pdf-vor |