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| article pdf uploaded. | 18 December 2019 08:04 CET | Updated version of record | https://www.mdpi.com/2076-3921/8/12/581/pdf |
| article xml uploaded. | 18 December 2019 08:04 CET | Update | https://www.mdpi.com/2076-3921/8/12/581/xml |
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| article html file updated | 17 December 2019 05:20 CET | Original file | N/A |
| article pdf uploaded. | 17 December 2019 05:18 CET | Updated version of record | https://www.mdpi.com/2076-3921/8/12/581/pdf-vor |
| article xml uploaded. | 17 December 2019 05:18 CET | Update | N/A |
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| article pdf uploaded. | 24 November 2019 10:12 CET | Version of Record | https://www.mdpi.com/2076-3921/8/12/581/pdf-vor |
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