| article html file updated | 5 February 2020 22:51 CET | Update | https://www.mdpi.com/2218-273X/2/4/549 |
| article html file updated | 19 September 2019 14:46 CEST | Update | - |
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| article html file updated | 12 May 2014 15:31 CEST | Update | - |
| article xml file uploaded | 12 May 2014 15:31 CEST | Original file | https://www.mdpi.com/2218-273X/2/4/549/xml |
| article html file updated | 7 February 2013 16:35 CET | Update | - |
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