| article html file updated | 19 August 2015 14:18 CEST | Update | https://www.mdpi.com/1424-8220/14/1/22 |
| article html file updated | 20 February 2014 08:52 CET | Original file | - |
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| article pdf uploaded. | 19 December 2013 12:04 CET | Version of Record | https://www.mdpi.com/1424-8220/14/1/22/pdf |
