| article html file updated | 16 August 2026 15:38 CEST | Update | https://www.mdpi.com/2223-7747/8/10/409 |
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| article pdf uploaded. | 12 October 2019 08:38 CEST | Version of Record | https://www.mdpi.com/2223-7747/8/10/409/pdf |
| article xml uploaded. | 12 October 2019 08:38 CEST | Update | https://www.mdpi.com/2223-7747/8/10/409/xml |
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