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| article pdf uploaded. | 14 November 2018 08:15 CET | Updated version of record | https://www.mdpi.com/2077-1312/6/4/135/pdf |
| article xml uploaded. | 14 November 2018 08:15 CET | Update | https://www.mdpi.com/2077-1312/6/4/135/xml |
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| article html file updated | 12 November 2018 08:27 CET | Original file | - |
| article pdf uploaded. | 12 November 2018 08:26 CET | Version of Record | https://www.mdpi.com/2077-1312/6/4/135/pdf-vor |
| article xml uploaded. | 12 November 2018 08:26 CET | Update | - |
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