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| article xml uploaded. | 30 January 2018 10:40 CET | Update | https://www.mdpi.com/2079-4991/8/2/60/xml |
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| article pdf uploaded. | 30 January 2018 10:40 CET | Updated version of record | https://www.mdpi.com/2079-4991/8/2/60/pdf |
| article html file updated | 24 January 2018 11:43 CET | Original file | - |
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| article pdf uploaded. | 24 January 2018 11:41 CET | Version of Record | https://www.mdpi.com/2079-4991/8/2/60/pdf-vor |
| article xml uploaded. | 24 January 2018 11:41 CET | Original file | - |
