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| article xml uploaded. | 19 July 2017 08:56 CEST | Original file | https://www.mdpi.com/2075-4663/5/3/52/xml |
| article pdf uploaded. | 19 July 2017 08:56 CEST | Updated version of record | https://www.mdpi.com/2075-4663/5/3/52/pdf |
| article pdf uploaded. | 17 July 2017 14:20 CEST | Version of Record | https://www.mdpi.com/2075-4663/5/3/52/pdf-vor |
