| article html file updated | 5 February 2020 12:47 CET | Update | https://www.mdpi.com/1999-4915/1/3/441 |
| article html file updated | 18 September 2019 19:16 CEST | Update | - |
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| article html file updated | 14 August 2014 12:06 CEST | Update | - |
| article xml file uploaded | 14 August 2014 12:06 CEST | Original file | https://www.mdpi.com/1999-4915/1/3/441/xml |
| article html file updated | 6 February 2013 15:50 CET | Update | - |
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| article html file updated | 17 January 2013 23:43 CET | Original file | - |
