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| article pdf uploaded. | 24 October 2018 11:57 CEST | Updated version of record | https://www.mdpi.com/2079-6439/6/4/75/pdf |
| article xml uploaded. | 24 October 2018 11:57 CEST | Update | https://www.mdpi.com/2079-6439/6/4/75/xml |
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| article pdf uploaded. | 2 October 2018 16:16 CEST | Updated version of record | https://www.mdpi.com/2079-6439/6/4/75/pdf-vor |
| article pdf uploaded. | 2 October 2018 15:55 CEST | Version of Record | https://www.mdpi.com/2079-6439/6/4/75/pdf-vor |
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