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| article pdf uploaded. | 5 September 2017 11:10 CEST | Updated version of record | https://www.mdpi.com/1424-8220/17/9/1987/pdf |
| article html file updated | 1 September 2017 04:20 CEST | Update | - |
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| article pdf uploaded. | 31 August 2017 11:36 CEST | Updated version of record | https://www.mdpi.com/1424-8220/17/9/1987/pdf-vor |
| article html file updated | 31 August 2017 04:30 CEST | Update | - |
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| article xml uploaded. | 31 August 2017 04:27 CEST | Update | - |
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| article pdf uploaded. | 30 August 2017 10:43 CEST | Version of Record | https://www.mdpi.com/1424-8220/17/9/1987/pdf-vor |
