| article html file updated | 16 June 2015 14:49 CEST | Update | https://www.mdpi.com/1424-8247/4/3/509 |
| article html file updated | 12 June 2014 12:31 CEST | Update | - |
| article xml file uploaded | 12 June 2014 12:31 CEST | Original file | https://www.mdpi.com/1424-8247/4/3/509/xml |
| article html file updated | 6 February 2013 20:17 CET | Update | - |
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| article html file updated | 28 January 2013 21:38 CET | Update | - |
| article html file updated | 26 January 2013 01:34 CET | Update | - |
| article html file updated | 22 January 2013 12:20 CET | Original file | - |
