| article html file updated | 31 August 2025 06:09 CEST | Update | https://www.mdpi.com/2199-8531/5/4/99 |
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| article pdf uploaded. | 19 December 2019 11:18 CET | Updated version of record | https://www.mdpi.com/2199-8531/5/4/99/pdf |
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| article pdf uploaded. | 9 December 2019 17:06 CET | Version of Record | https://www.mdpi.com/2199-8531/5/4/99/pdf-vor |
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