| article html file updated | 16 June 2015 20:00 CEST | Update | https://www.mdpi.com/1999-4923/3/4/848 |
| article html file updated | 3 December 2013 08:24 CET | Update | - |
| article xml file uploaded | 3 December 2013 08:24 CET | Original file | https://www.mdpi.com/1999-4923/3/4/848/xml |
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