| article html file updated | 17 June 2015 06:14 CEST | Update | https://new.mdpi.com/1424-8220/13/2/2011 |
| article html file updated | 30 October 2013 09:48 CET | Update | - |
| article xml file uploaded | 30 October 2013 09:47 CET | Update | https://new.mdpi.com/1424-8220/13/2/2011/xml |
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| article html file updated | 25 March 2013 12:18 CET | Original file | - |
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| article pdf uploaded. | 6 February 2013 16:14 CET | Updated version of record | https://new.mdpi.com/1424-8220/13/2/2011/pdf |
| article pdf uploaded. | 5 February 2013 11:36 CET | Version of Record | https://new.mdpi.com/1424-8220/13/2/2011/pdf-vor |
