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| article html file updated | 27 February 2017 10:56 CET | Original file | - |
| article xml uploaded. | 27 February 2017 10:55 CET | Original file | https://www.mdpi.com/1999-4907/8/3/56/xml |
| article pdf uploaded. | 27 February 2017 10:55 CET | Updated version of record | https://www.mdpi.com/1999-4907/8/3/56/pdf |
| article pdf uploaded. | 25 February 2017 11:29 CET | Version of Record | https://www.mdpi.com/1999-4907/8/3/56/pdf-vor |
