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| article xml uploaded. | 11 February 2018 06:40 CET | Original file | https://www.mdpi.com/1999-4907/9/2/84/xml |
| article pdf uploaded. | 11 February 2018 06:40 CET | Updated version of record | https://www.mdpi.com/1999-4907/9/2/84/pdf |
| article pdf uploaded. | 9 February 2018 17:22 CET | Version of Record | https://www.mdpi.com/1999-4907/9/2/84/pdf-vor |
