| article html file updated | 5 February 2020 14:02 CET | Update | https://www.mdpi.com/1424-8247/3/4/994 |
| article html file updated | 9 May 2019 07:25 CEST | Update | - |
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| article html file updated | 16 June 2015 08:57 CEST | Update | - |
| article html file updated | 5 June 2014 08:52 CEST | Original file | - |
| article xml file uploaded | 5 June 2014 08:51 CEST | Original file | https://www.mdpi.com/1424-8247/3/4/994/xml |
