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| article xml uploaded. | 24 February 2017 05:18 CET | Update | https://www.mdpi.com/2071-1050/9/2/303/xml |
| article pdf uploaded. | 24 February 2017 05:18 CET | Updated version of record | https://www.mdpi.com/2071-1050/9/2/303/pdf |
| article html file updated | 21 February 2017 11:50 CET | Original file | - |
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| article pdf uploaded. | 21 February 2017 11:49 CET | Version of Record | https://www.mdpi.com/2071-1050/9/2/303/pdf-vor |
