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| article xml uploaded. | 6 February 2017 12:30 CET | Original file | https://www.mdpi.com/1424-8220/17/2/257/xml |
| article pdf uploaded. | 6 February 2017 12:30 CET | Updated version of record | https://www.mdpi.com/1424-8220/17/2/257/pdf |
| article pdf uploaded. | 28 January 2017 10:10 CET | Version of Record | https://www.mdpi.com/1424-8220/17/2/257/pdf-vor |
