| article html file updated | 5 February 2020 20:57 CET | Update | https://www.mdpi.com/2077-0375/2/3/346 |
| article html file updated | 8 May 2019 16:59 CEST | Update | - |
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| article html file updated | 18 March 2014 09:49 CET | Update | - |
| article xml file uploaded | 18 March 2014 09:49 CET | Original file | https://www.mdpi.com/2077-0375/2/3/346/xml |
| article html file updated | 7 February 2013 13:10 CET | Update | - |
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| article html file updated | 23 January 2013 20:50 CET | Original file | - |