| article html file updated | 6 February 2020 15:00 CET | Update | https://www.mdpi.com/2073-4409/4/1/19 |
| article html file updated | 7 May 2019 02:52 CEST | Update | - |
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| article xml file uploaded | 1 April 2015 11:10 CEST | Update | https://www.mdpi.com/2073-4409/4/1/19/xml |
| article html file updated | 20 January 2015 08:37 CET | Original file | - |
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| article pdf uploaded. | 7 January 2015 17:45 CET | Version of Record | https://www.mdpi.com/2073-4409/4/1/19/pdf |
