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| article pdf uploaded. | 8 February 2019 09:56 CET | Updated version of record | https://www.mdpi.com/1996-1073/12/3/481/pdf |
| article xml uploaded. | 8 February 2019 09:56 CET | Update | https://www.mdpi.com/1996-1073/12/3/481/xml |
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| article html file updated | 2 February 2019 06:42 CET | Original file | - |
| article pdf uploaded. | 2 February 2019 06:40 CET | Version of Record | https://www.mdpi.com/1996-1073/12/3/481/pdf-vor |
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