| article html file updated | 7 February 2020 07:26 CET | Update | https://www.mdpi.com/2073-4409/5/2/18 |
| article html file updated | 5 May 2019 18:19 CEST | Update | - |
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| article html file updated | 4 July 2016 12:13 CEST | Update | - |
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| article xml uploaded. | 18 April 2016 12:02 CEST | Original file | https://www.mdpi.com/2073-4409/5/2/18/xml |
| article pdf uploaded. | 18 April 2016 12:02 CEST | Version of Record | https://www.mdpi.com/2073-4409/5/2/18/pdf |
