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| article xml uploaded. | 13 August 2017 05:39 CEST | Original file | https://www.mdpi.com/1660-3397/15/8/252/xml |
| article pdf uploaded. | 13 August 2017 05:39 CEST | Updated version of record | https://www.mdpi.com/1660-3397/15/8/252/pdf |
| article pdf uploaded. | 11 August 2017 14:55 CEST | Version of Record | https://www.mdpi.com/1660-3397/15/8/252/pdf-vor |
