| article html file updated | 5 February 2020 22:36 CET | Update | https://www.mdpi.com/2072-6643/4/11/1552 |
| article html file updated | 19 September 2019 14:21 CEST | Update | - |
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| article html file updated | 29 October 2013 08:06 CET | Update | - |
| article xml file uploaded | 29 October 2013 08:06 CET | Update | https://www.mdpi.com/2072-6643/4/11/1552/xml |
| article html file updated | 7 February 2013 16:08 CET | Update | - |
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| article html file updated | 16 January 2013 11:28 CET | Original file | - |
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