| article html file updated | 31 August 2025 05:09 CEST | Update | https://www.mdpi.com/2223-7747/8/12/542 |
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| article pdf uploaded. | 26 November 2019 08:07 CET | Version of Record | https://www.mdpi.com/2223-7747/8/12/542/pdf |
| article xml uploaded. | 26 November 2019 08:07 CET | Update | https://www.mdpi.com/2223-7747/8/12/542/xml |
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