| article html file updated | 16 June 2015 20:46 CEST | Update | https://www.mdpi.com/1424-8220/12/1/42 |
| article html file updated | 31 October 2013 10:25 CET | Update | - |
| article xml file uploaded | 31 October 2013 10:25 CET | Original file | https://www.mdpi.com/1424-8220/12/1/42/xml |
| article html file updated | 7 February 2013 09:24 CET | Update | - |
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| article html file updated | 26 January 2013 07:05 CET | Update | - |
| article html file updated | 23 January 2013 06:15 CET | Original file | - |
