| article html file updated | 16 June 2015 19:31 CEST | Update | https://www.mdpi.com/2072-6694/3/4/3991 |
| article html file updated | 5 September 2013 12:05 CEST | Update | - |
| article xml file uploaded | 5 September 2013 12:05 CEST | Update | https://www.mdpi.com/2072-6694/3/4/3991/xml |
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| article html file updated | 6 February 2013 23:13 CET | Update | - |
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| article html file updated | 26 January 2013 05:50 CET | Update | - |
| article html file updated | 23 January 2013 00:51 CET | Original file | - |
