| article html file updated | 31 August 2025 09:39 CEST | Update | https://www.mdpi.com/2305-6304/8/1/6 |
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| article pdf uploaded. | 9 March 2020 05:06 CET | Updated version of record | https://www.mdpi.com/2305-6304/8/1/6/pdf |
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| article pdf uploaded. | 22 January 2020 07:34 CET | Version of Record | https://www.mdpi.com/2305-6304/8/1/6/pdf-vor |
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