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| article pdf uploaded. | 22 November 2018 05:09 CET | Updated version of record | https://www.mdpi.com/2077-1312/6/4/142/pdf |
| article xml uploaded. | 22 November 2018 05:09 CET | Update | https://www.mdpi.com/2077-1312/6/4/142/xml |
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| article html file updated | 19 November 2018 13:56 CET | Original file | - |
| article pdf uploaded. | 19 November 2018 13:55 CET | Version of Record | https://www.mdpi.com/2077-1312/6/4/142/pdf-vor |
| article xml uploaded. | 19 November 2018 13:55 CET | Update | - |
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