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| article pdf uploaded. | 5 December 2018 10:38 CET | Updated version of record | https://www.mdpi.com/2075-4701/8/12/997/pdf |
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| article pdf uploaded. | 27 November 2018 16:42 CET | Updated version of record | https://www.mdpi.com/2075-4701/8/12/997/pdf-vor |
| article pdf uploaded. | 27 November 2018 16:30 CET | Version of Record | https://www.mdpi.com/2075-4701/8/12/997/pdf-vor |
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