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| article pdf uploaded. | 24 July 2018 05:59 CEST | Updated version of record | https://www.mdpi.com/2225-1154/6/3/64/pdf |
| article xml uploaded. | 24 July 2018 05:59 CEST | Update | https://www.mdpi.com/2225-1154/6/3/64/xml |
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| article pdf uploaded. | 24 July 2018 05:54 CEST | Updated version of record | https://www.mdpi.com/2225-1154/6/3/64/pdf-vor |
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| article pdf uploaded. | 21 July 2018 12:07 CEST | Updated version of record | https://www.mdpi.com/2225-1154/6/3/64/pdf-vor |
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| article pdf uploaded. | 21 July 2018 12:06 CEST | Version of Record | https://www.mdpi.com/2225-1154/6/3/64/pdf-vor |