| article html file updated | 17 June 2015 12:02 CEST | Update | https://www.mdpi.com/1424-8220/13/8/9921 |
| article html file updated | 1 November 2013 13:56 CET | Update | N/A |
| article xml file uploaded | 1 November 2013 13:56 CET | Update | https://www.mdpi.com/1424-8220/13/8/9921/xml |
| article html file updated | 1 November 2013 11:46 CET | Update | N/A |
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| article html file updated | 25 October 2013 10:12 CEST | Update | N/A |
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| article html file updated | 26 September 2013 13:49 CEST | Original file | N/A |
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| article pdf uploaded. | 5 August 2013 17:10 CEST | Version of Record | https://www.mdpi.com/1424-8220/13/8/9921/pdf |
