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| article html file updated | 6 November 2018 03:34 CET | Original file | - |
| article pdf uploaded. | 6 November 2018 03:32 CET | Updated version of record | https://www.mdpi.com/2227-9709/5/4/40/pdf |
| article xml uploaded. | 6 November 2018 03:32 CET | Update | https://www.mdpi.com/2227-9709/5/4/40/xml |
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| article pdf uploaded. | 28 October 2018 08:55 CET | Version of Record | https://www.mdpi.com/2227-9709/5/4/40/pdf-vor |
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