| article html file updated | 29 August 2025 20:27 CEST | Update | https://www.mdpi.com/1999-4915/4/9/1548 |
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| article xml file uploaded | 14 August 2014 12:06 CEST | Original file | https://www.mdpi.com/1999-4915/4/9/1548/xml |
| article html file updated | 7 February 2013 14:55 CET | Update | N/A |
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| article html file updated | 24 January 2013 01:45 CET | Original file | N/A |
