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| article html file updated | 24 December 2018 10:43 CET | Original file | - |
| article pdf uploaded. | 24 December 2018 10:42 CET | Updated version of record | https://www.mdpi.com/2313-433X/5/1/2/pdf |
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| article pdf uploaded. | 21 December 2018 17:27 CET | Updated version of record | https://www.mdpi.com/2313-433X/5/1/2/pdf-vor |
| article pdf uploaded. | 21 December 2018 17:24 CET | Version of Record | https://www.mdpi.com/2313-433X/5/1/2/pdf-vor |
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