| article html file updated | 30 August 2025 10:47 CEST | Update | https://www.mdpi.com/2218-1997/5/1/20 |
| article html file updated | 20 July 2022 16:18 CEST | Update | N/A |
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| article pdf uploaded. | 9 January 2019 12:04 CET | Version of Record | https://www.mdpi.com/2218-1997/5/1/20/pdf |
| article xml uploaded. | 9 January 2019 12:04 CET | Update | https://www.mdpi.com/2218-1997/5/1/20/xml |
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