| article html file updated | 17 June 2015 07:34 CEST | Update | https://www.mdpi.com/2072-4292/5/3/1355 | 
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| article pdf uploaded. | 14 March 2013 12:10 CET | Version of Record | https://www.mdpi.com/2072-4292/5/3/1355/pdf |