| article html file updated | 5 February 2020 19:19 CET | Update | https://www.mdpi.com/1999-4923/4/1/149 |
| article html file updated | 8 May 2019 20:34 CEST | Update | - |
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| article xml file uploaded | 28 April 2014 11:04 CEST | Original file | https://www.mdpi.com/1999-4923/4/1/149/xml |
| article html file updated | 7 February 2013 10:12 CET | Update | - |
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| article html file updated | 23 January 2013 09:10 CET | Original file | - |