| article html file updated | 6 February 2020 00:02 CET | Update | https://www.mdpi.com/2073-4344/3/1/11 |
| article html file updated | 8 May 2019 09:44 CEST | Update | - |
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| article xml uploaded. | 31 January 2013 14:27 CET | Update | https://www.mdpi.com/2073-4344/3/1/11/xml |
| article html file updated | 24 January 2013 12:24 CET | Update | - |
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| article html file updated | 21 January 2013 11:38 CET | Original file | - |
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