| article html file updated | 31 August 2025 02:18 CEST | Update | https://www.mdpi.com/2227-7072/7/4/57 |
| article html file updated | 20 July 2022 02:22 CEST | Update | - |
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| article html file updated | 31 December 2019 06:06 CET | Update | - |
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| article pdf uploaded. | 1 October 2019 12:59 CEST | Version of Record | https://www.mdpi.com/2227-7072/7/4/57/pdf |
| article xml uploaded. | 1 October 2019 12:59 CEST | Update | https://www.mdpi.com/2227-7072/7/4/57/xml |
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