| article html file updated | 31 August 2025 07:31 CEST | Update | https://www.mdpi.com/1660-3397/18/1/20 |
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| article pdf uploaded. | 26 December 2019 04:48 CET | Version of Record | https://www.mdpi.com/1660-3397/18/1/20/pdf |
| article xml uploaded. | 26 December 2019 04:48 CET | Update | https://www.mdpi.com/1660-3397/18/1/20/xml |
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