| article html file updated | 24 December 2025 16:24 CET | Update | https://www.mdpi.com/2227-7102/9/4/271 |
| article html file updated | 31 August 2025 04:27 CEST | Update | - |
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| article html file updated | 11 November 2019 12:44 CET | Original file | - |
| article pdf uploaded. | 11 November 2019 12:43 CET | Version of Record | https://www.mdpi.com/2227-7102/9/4/271/pdf |
| article xml uploaded. | 11 November 2019 12:43 CET | Update | https://www.mdpi.com/2227-7102/9/4/271/xml |
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