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| article xml uploaded. | 26 September 2017 11:40 CEST | Original file | https://www.mdpi.com/2227-7080/5/4/62/xml |
| article pdf uploaded. | 26 September 2017 11:40 CEST | Updated version of record | https://www.mdpi.com/2227-7080/5/4/62/pdf |
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| article pdf uploaded. | 25 September 2017 15:27 CEST | Version of Record | https://www.mdpi.com/2227-7080/5/4/62/pdf-vor |