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| article xml uploaded. | 26 June 2019 11:48 CEST | Update | https://www.mdpi.com/2075-4701/9/6/699/xml |
| article pdf uploaded. | 26 June 2019 11:48 CEST | Updated version of record | https://www.mdpi.com/2075-4701/9/6/699/pdf |
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| article pdf uploaded. | 21 June 2019 09:10 CEST | Version of Record | https://www.mdpi.com/2075-4701/9/6/699/pdf-vor |
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