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| article xml uploaded. | 13 February 2018 06:30 CET | Original file | https://www.mdpi.com/2076-3263/8/2/69/xml |
| article pdf uploaded. | 13 February 2018 06:30 CET | Updated version of record | https://www.mdpi.com/2076-3263/8/2/69/pdf |
| article pdf uploaded. | 11 February 2018 13:43 CET | Version of Record | https://www.mdpi.com/2076-3263/8/2/69/pdf-vor |
