| article html file updated | 18 August 2026 01:03 CEST | Update | https://www.mdpi.com/2218-1997/6/9/147 |
| article html file updated | 1 September 2025 07:57 CEST | Update | N/A |
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| article xml uploaded. | 8 September 2020 16:18 CEST | Update | https://www.mdpi.com/2218-1997/6/9/147/xml |
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